当前位置:首页 > 高考 > 数学试卷

【334351】2024年上海市高考数学试卷

时间:2025-01-21 18:05:56 作者: 字数:11534字

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

学校: 姓名: 班级: 考号:



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


绝密★启用前

153731-2024年上海市高考数学试卷-网络收集版


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、填空题

1.设全集  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,集合  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>       .

2.已知  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>       .

3  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的解集为      .

4.已知  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,已知  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 是奇函数,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>       .

5.已知  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,且  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,则  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的值为      

6.在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的二项展开式中,若各项系数和为32,则  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>               

7.已知抛物线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上有一点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 到准线的距离为9,那么  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 轴的距离为      .

8.某校举办科学竞技比赛,有  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 种题库,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库有5000道题,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库有4000道题,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库有3000道题.小申已完成所有题,他  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库的正确率是0.92  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库的正确率是0.86  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库的正确率是0.72.现他从所有的题中随机选一题,正确率

      .

9.已知虚数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,其实部为1,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,则实数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>       .

10.设集合  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 中的元素皆为无重复数字的三位正整数,且元素中任意两者之积皆为偶数,求集合中元素个数的最大值      .

11.已知  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 正东方向,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的正北方向,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 距离相等, ,, <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>       (精确到0.1).

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

12.等比数列  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 首项  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,若对任意正整数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 是闭区间,则  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的范围是      .

二、单选题

13.已知气候温度和海水表层温度相关,且相关系数为负数,对此描述正确的是(      )

A.气候温度高,海水表层温度就高

B.气候温度高,海水表层温度就低

C.随着气候温度由低到高,海水表层温度呈上升趋势

D.随着气候温度由低到高,海水表层温度呈下降趋势

14.下列函数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的最小正周期是 π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的是(      )

A  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> B  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

C  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> D  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

15.定义一个集合  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,集合元素是空间内的点集,任取  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,存在不全为0的实数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,使得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .已知  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的充分条件是(      )

A  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> B  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

C  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> D  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

16.定义集合  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,在使得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的所有  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 中,下列成立的是(      )

A  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 是偶函数 B  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 处取最大值

C  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 严格增 D  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 处取到极小值

三、解答题

17.如图为正四棱锥   <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  为底面  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的中心.

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

1)若  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 求   <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  绕   <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 旋转一周形成的几何体的体积;

2)若  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 为   <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  的中点,求直线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>   与平面   <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 所成角的大小

18.若  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

(1)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的解集;

(2)存在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 使得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 成等差数列,求  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的取值范围,

19.为了解某地初中学生体育般炼时长与学业成绩的关系,从该地区29000名学生中抽取580人,得到日均体有锻炼时长与学业成绩的数据如下表所示:

时间范围

[0,0.5)

[0.5,1)

[1,1.5)

[1.5,2)

[2,2.5)

学业成绩

优秀

5

44

42

3

1

不优秀

134

147

137

40

27

 

(1)该地区29000名学生中体育鞭炼时长大于1小时人数约为多少?

(2)估计该地区初中学生日均体育锻炼的时长(精确列0.1)

(3)是否有0.95的把握认为学业成绩优秀与日均体有鞭炼时长不小于1小时且小于2小时有关?

20.双曲线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 为左右顶点,过点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的直线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 交 双曲线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 于两点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 且点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在第一象限,

1  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 时,求  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

2  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 为等腰三角形时,求点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的坐标.

(3)过点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,延长线交  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 于点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 取值范围.

21.对于一个函数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 和一个点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 取到最小值的点,则称  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的最近点.

(1)对于  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,求证:对于点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,存在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,使得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的最近点;

(2)对于  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,请判断是否存在一个点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,它是  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 最近点,且直线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 处的切线垂直;

(3)题干缺失

参考答案

一、填空题

1.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

2.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

3.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

4. 0

可知,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


5. 15

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,解得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

故答案15


6. 5

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,即  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,解得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

故答案5


7.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 标为  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 到准线的距离9,即  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,代入抛物线方程,可得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的距离  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


8.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

可知,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库占比  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库占比  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 题库占比  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


9. 2

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,解得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


10. 329

可知,集合  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 中每个元素都互异的,且元素中最多有一个奇数,剩余全是偶数.先研究集合中无重复数字的三位偶数:

(1)若个位0这样的偶数有  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 种;

(2)若个位不0这样的偶数有  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 种;

所以集合元素个数最大值为  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


11.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

不妨  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

所以在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 中,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 中,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

①②③立得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


12.  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

不妨  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 均在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 均在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在两个区间则  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,又因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 恒成立即可,化  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以有  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 恒成立.


二、单选题

13. D

由于相关系数表示一个另一个趋势的影响,

所以随着气候温度由低到高,海水表温度呈下降趋势.

D


14. A

π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,足条件,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 正确;B,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , ππ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,足条件,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误C,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,函数,不存在最小正周期,不足条件,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误D,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , ππ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,足条件,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误.故答案  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


15. C

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 不全0  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以三个向量无法构成三系的一基,又因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,三者可以构成一基,故不能推出  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 均属于  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 线,所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 可以属于  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,三者不共面,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,然,三者可以构成一基,与条件不符合,故可以推出  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 正确;

D,三者无法构成一基,故不能推出  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误.故答案  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


16. D

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,又因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 恒成立,明在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上,函数单调递增,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误

B,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 且在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上,函数单调递增,故函数在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上最大值为  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,若函数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的集合不会是  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以在1取到极大,在2不一定取最大,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,若函数  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 格增,集合  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的取不会是  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,而是全体定域,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 错误

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以-1不是单调递减,若左侧单调递增,或者在某一段单调递增,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的集合不会是  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以在-1一段是常函数,又因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上,函数单调递增,故  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 正确.


三、解答题

17. 1π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ;(2π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

1)因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 是正四棱,所以底面  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 是正方形,且  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 底面  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 一周形成的几何体是以3底面半径,4高的圆锥

所以 圆锥ππ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

2)如建立空直角坐系,因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 是正四棱,所以四棱各棱相等,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

可得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 平面  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的法向量,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>   与面  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>   所成角  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以 π <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


18. (1)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ; (2)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

(1)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 可得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上是格增函数,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以解集  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

(2)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 成等差数列,所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 有解,化可得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 上有解,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 故在  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


19. (1)12500人;(2)0.9h:(3)学业成绩与吸炼时长不小于1小时且小于2两小时有关

1580人中体育锻炼时长不小于1人数占比  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

地区29000名初中学生中体育锻炼时长不小于1的人数约为  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

(2)地区初中学生锻炼平均时长约为

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

(3)

 

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

其他

45

50

95

177

308

485

提出原假  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 绩优秀与日均体育锻炼时长不小于1且小于2无关。

确定著性水平  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

否定原假,即学绩优秀与日均体育锻炼时长不小于1且小于2有关.


20. (1)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ; (2)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ; (3)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

(1)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> , 所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ()

(2)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 等腰三角形,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 底,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在直线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,与  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在第一象限矛盾,故舍去,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 底,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 矛盾,故舍去,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>   底,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,又因  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .

(3)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,又由  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,即  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

后可得到  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

再由达定理得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,

所以  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> .


21. (1)见解析;(2)存在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 使直线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 处的切线垂直;(3)

(1)明:  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,当且  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 取到最小,所以于点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 存在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 使得  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的最近点;

(2)  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

0

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

0

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>

格减

极小

格增

 

所以当  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 取到最小,此  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的切线为  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> ,所以存在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 使直线  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 在点  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/118/" title="上海" class="c1" target="_blank">上海</a> <a href="/tags/263/" title="上海市" class="c1" target="_blank">上海市</a> 的切线垂直.