当前位置:首页 > 高考 > 数学试卷

【334347】2024年普通高等学校招生全国统一数学考试北京卷

时间:2025-01-21 18:05:09 作者: 字数:16389字
简介:

……………○……………外……………○……………装……………○……………订……………○……………线……………○………………

学校: 姓名: 班级: 考号:



……………○……………内……………○……………装……………○……………订……………○……………线……………○………………


绝密★启用前

153582-3 2024年普通高等学校招生全国统一考试(北京卷)2025高考试题攻略 第1辑 一年真题风标卷 数学》


学校:___________姓名:___________班级:___________考号:___________


题号

总分

得分






注意事项:

1.答题前填写好自己的姓名、班级、考号等信息

2.请将答案正确填写在答题卡上


一、选择题(本大题共10小题,每小题4,40分。在每小题列出的四个选项中,只有一项是符合题目要求的)

1.已知集合M={x|-3<  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <1},N={x|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <4},  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (      )

A{x|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <1}    B{x|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >-3}

C{x|-3<  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <4}    D{x|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <4}

2.若复数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 满足 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

A-1-iB-1+iC1-iD1+i

3.圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的圆心到  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的距离为(      )

A <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>     B2    C3    D3 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

4.在(x- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> )4的展开式中  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的系数为

A6   B-6   C12D-12

5.设  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是向量,则“  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ”是“  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ”的

A.充分不必要条件

B.必要不充分条件

C.充要条件

D.既不充分也不必要条件

6.设函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  ωx(ω>0),已知  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |的最小值为 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (      )

A1    B2    C3    D4

7.生物丰富度指数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是河流水质的一个评价指标,其中  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 分别表示河流中的生物种类数与生物个体总数,生物丰富度指数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 越大,水质越好  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 如果某河流治理前后的生物种类数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 没有变化,生物个体总数由  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 变为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,生物丰富度指数由  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 提高到  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

A3N2=2N1    B2N2=3N1

C <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>     D <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

8.如图,在四棱锥  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,底面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是边长为4的正方形  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,该棱锥的高为

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

A1B2C <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> D <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

9.已知  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的图像上两个不同的点,则(      )

Alog2 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> < <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>     Blog2 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> > <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

Clog2 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>     Dlog2 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

10.已知M={(x,y)|y=x+t(x2-x),1≤x≤2,0≤t≤1}是平面直角坐标系中的点集  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中两点间的距离的最大值  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 表示的图形的面积,

Ad=3,S<1     Bd=3,S>1

Cd= <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <1Dd= <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >1

二、填空题(本大题共5小题,每小题5,25分。把答案填在题中的横线上)

11.抛物线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的焦点坐标为    

12.在平面直角坐标系  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 与角  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 均以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为始边,它们的终边关于原点对称  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,cos  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的最大值为    

13.若直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 与双曲线 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 只有一个公共点,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的一个取值为    

14.汉代刘歆设计的“铜嘉量”是龠、合、升、斗、斛五量合一的标准量器,其中升量器、斗量器、斛量器的形状均可视为圆柱  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 若升、斗、斛量器的容积成公比为10的等比数列,底面直径依次为65 mm325 mm325 mm,且斛量器的高为230 mm,则斗量器的高为    mm,升量器的高为     mm.(不计量器的厚度

15.设  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是两个不同的无穷数列,且都不是常数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 记集合M={k|ak=bk,kN*},给出下列四个结论:

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 均为等差数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多有1个元素;

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 均为等比数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多有2个元素;

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为等差数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为等比数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多有3个元素;

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为递增数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为递减数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多有1个元素  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

其中正确结论的序号是    

三、解答题(本大题共6小题,85分。解答应写出文字说明、证明过程或演算步骤)

16(13)  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为钝角  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

(2)再从条件、条件、条件这三个条件中选择一个作为已知,使得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 存在,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的面积  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

条件:  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

条件:cos  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

条件:  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

:如果选择的条件不符合要求,(2)问得0;如果选择多个符合要求的条件分别解答,按第一个解答计分  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

17(14)如图,在四棱锥  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为线段  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的中点,求证:  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

(2)  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,求平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 与平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 夹角的余弦值  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

18(13)某保险公司为了解该公司某种保险产品的索赔情况,从合同保险期限届满的保单中随机抽取1 000,记录并整理这些保单的索赔情况,获得数据如下表:

索赔次数

0

1

2

3

4

保单份数

800

100

60

30

10

假设:一份保单的保费为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 万元;前三次索赔时,保险公司每次赔偿  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 万元;第四次索赔时,保险公司赔偿  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 万元  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

假设不同保单的索赔次数相互独立,用频率估计概率  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)估计一份保单索赔次数不少于2的概率;

(2)一份保单的毛利润定义为这份保单的保费与赔偿总金额之差  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

()  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为一份保单的毛利润,估计  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的数学期望  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

()如果无索赔的保单的保费减少4%,有索赔的保单的保费增加20%,试比较这种情况下一份保单毛利润的数学期望估计值与()  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 估计值的大小.(结论不要求证明)

19.已知椭圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> : <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> + <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =1(a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >0),以椭圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的焦点和短轴端点为顶点的四边形是边长为2的正方形  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 过点(0,t)(t> <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> )且斜率存在的直线与椭圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 交于不同的两点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,过点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 和椭圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的另一个交点为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)求椭圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的方程及离心率;

(2)若直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的斜率为0,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的值  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

20(15)设函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是曲线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 在点(t,f(t))(t>0)处的切线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的单调区间;

(2)求证:  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 不经过点(0,0);

(3)  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,设点A(t,f(t))(t>0),C(0,f(t)),O(0,0),B  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 轴的交点,SACOSABO分别表示  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的面积,是否存在点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 使得2SACO=15SABO成立?若存在,这样的点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 有几个?

(参考数据:  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <ln 3<  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <ln 5<  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <ln 7<1.95)

21(15)已知集合M={(i,j,k,w)|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为偶数}.

给定数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,…  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 和序列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,…  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,其中Ts=(it,jt,kt,wt)M(t=1,2,…,s),对数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 进行如下变换:  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的第  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 项均加1,其余项不变,得到的数列记作  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的第  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 项均加1,其余项不变,得到的数列记作  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;…;以此类推,得到数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,简记为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)给定数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :1,3,2,4,6,3,1,9和序列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :(1,3,5,7),(2,4,6,8),(1,3,5,7),写出  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

(2)是否存在序列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,使得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ?

若存在,写出一个  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,若不存在,说明理由;

3)若数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的各项均为正整数,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为偶数,求证:“存在序列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,使得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的各项都相等”的充要条件为“  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

参考答案

一、选择题(本大题共10小题,每小题4,40分。在每小题列出的四个选项中,只有一项是符合题目要求的)

1. C

集合M={x|-3<  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <1},N={x|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <4},所以MN={x|-3<  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <4}.C


2. C

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,C


3. D

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 准方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,心坐标为(1,-3),因此心到直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的距离  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =3 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,D


4. A

(x- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> )4的展开式的通  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> x4-k(- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> )k=(-1)k <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,4- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =3,解得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以在(x- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> )4的展开式中  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的系数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> A


5. B

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,不能得到  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,充分性不成立;  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 成立,必要性成立  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的必要不充分条件  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> B


6. B

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 别为函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的最小点、最大  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =2× <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> B


7. D

意可得 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

两式相除得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

所以ln  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 选项可知,D


8. D

四棱的底面是边长为4的正方形,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的中点分别为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,且平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 于点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 平面  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,可求得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,根据面相等可得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ×2,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> D

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


9. B

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,等号取不到,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> > <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> B


10. C

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 可看作关于  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的一次函数,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 关于  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递增或  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 是关于  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的常数函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 像的轴为线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> - <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ≤0,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 关于  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的函数在[1,2]单调递,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 均取最小  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 均取最大值时  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中两点的距离最大  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 取最大,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中点(1,1)(2,4)的距离最大,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 表示的形如阴影所示,利用大方形的面减去小正方形及两个梯形的面,可得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> C

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


二、填空题(本大题共5小题,每小题5,25分。把答案填在题中的横线上)

11. (4,0)

由抛物线准方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以焦点坐标为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


12. - <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,cos <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , ππ <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,cos πππ <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,cos  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的最大值为- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


13.  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

双曲线 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 线方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ± <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 定点(3,0),只有当直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 线平行,线与双曲线才只有一个公共点,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的取值为± <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (任答一个即可得分).


14. 23  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

升量器的高  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,底面半径  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,积为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,斗量器的高  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,底面半径  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,积为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,斛量器的高  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,底面半径  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,积为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> mm,

π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ππ <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ππ <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 成等比数列且公比  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,解得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,解得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 斗量器的高  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> mm,升量器的高  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


15. ①③④

,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 等差数列,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

故可将  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 看作是关于  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的一次函数,

像最多只有一个交点,且交点横坐不是整数,不存在  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多只有1个元素,正确  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 等比数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 偶数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中有无数个元素,错误  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 等差数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 等比数列,则设  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,由一次函数和指数函数的性可知  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多有2个元素  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <0  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 分奇偶在函数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 像上,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 可知  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中可能有0,1,2,3个元素,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中有3个元素,正确  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为递增数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的增大而增大,在平面直角坐系中,散点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 由左下到右上分布;  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为递减数列,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的增大而减小,在平面直角坐系中,散点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 由左上到右下分布  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

故点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 与点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 最多只能重合一次,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中最多只有1个元素,正确  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

,正确结论的序号是①③④  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


三、解答题(本大题共6小题,85分。解答应写出文字说明、证明过程或演算步骤)

16. 1 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>    2 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)意知  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为钝,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,2sin  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

2sin  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> · <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,sin  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

2= <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,sin  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 为钝,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(2),  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,构不成三角形,不符合  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

,cos  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,sin  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

由正弦定理可得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =3,

sin  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> π <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

= <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> × <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> - <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> × <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

SABC= <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ×7×3× <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

由余弦定理得cos  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,解得b=3(负值舍去),

SABC= <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ×3×5× <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


17. 1)见解析    (2 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(1)明】取  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 中点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 别为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的中点,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


18. 1 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>       2()0.122     ()大于

(1)一份保次数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> + <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> + <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

一份保次数不少于2的概率 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(2)()X的可能取值为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> -2× <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

()的保费调整后,无索的保费为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 万元,有索的保费为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 万元  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

毛利  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的可能取值为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

整后的保毛利的数学期望的估计值大于整前的保毛利数学期望的估计值  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


19. (1) <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> + <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =1    <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>     (2)2

(1),b2+c2=4,b=c(提示:正方形的线互相垂直平分且相等),解得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =2,

所以椭圆  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的方程 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> + <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =1,离心率  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(2)线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的斜率存在,所以线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> , <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 消去  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 并整理得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >0,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,D(-x2,y2)(提示:线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的斜率0,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,根据椭圆称性,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 关于  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 轴对),x1+x2=- <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,又直线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> - <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =0,整理得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


20. (1)单调递减区间为(-1,0),单调递增区间为(0,+∞)    2)见解析 (3)存在   两个

(1)【解】因  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以f(x)=x-ln(1+x)(x>-1),

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (x>-1).

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递减区间为(-1,0),单调递增区间为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(2)明】因  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

所以曲线  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 在点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的切线方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

整理得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >0,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >0  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >0,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (0,+∞)单调递,所以当  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ;

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <0  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (0,+∞)单调递,所以当  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

即当  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 经过  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(3)【解】存在  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(先根据意表示出相关的量,并将三角形面用含  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的式子表示出来)

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

(2),  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的方程  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

2SACO=15SABO成立, <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ×|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |×|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |=15× <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ×|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |×|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |,2|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |=15|  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> |,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,整理得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> = <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> <  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 单调递,

又当  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 0  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> +∞  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> +∞,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的极大值为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> >  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的极小值为  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 5<0,

作出  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的大致像如所示  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> (0,+∞)上有两个零点,故有两个这样的点  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 使2SACO=15SABO. <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>


21. (1)Ω(A)=T3T2T1(A):3,4,4,5,8,4,3,10    2)不存在   (3)见解析

(1)【解】由  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :2,3,3,4,7,3,2,9,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :2,4,3,5,7,4,2,10,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> :  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(2)【解】由知每次变换数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的所有的和增加4,

2+6+4+2+8+2+4+4=32,经过 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> =8变换  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的增量和均8,

式中  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 增量和不,故不存在符合意的序列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

(3)明】数列  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 变换,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

必要性:

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

充分性:

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 偶数,所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 有均奇数,偶数,两奇两偶三种情形,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 偶数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 偶数,

可得  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 偶数,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 偶数  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

故存在  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> 的情形  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

 <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,

所以  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a> ,  <a href="/tags/37/" title="普通" class="c1" target="_blank">普通</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/56/" title="北京" class="c1" target="_blank">北京</a> <a href="/tags/261/" title="考试" class="c1" target="_blank">考试</a> <a href="/tags/491/" title="学校" class="c1" target="_blank">学校</a> <a href="/tags/881/" title="统一" class="c1" target="_blank">统一</a>