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【327960】2024年四川省甘孜州中考数学试题

时间:2025-01-20 20:50:22 作者: 字数:13858字
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绝密★启用前

200674-2024年四川省甘孜州中考数学试题


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、单选题

1  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的相反数是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2.由4个大小相同的正方体搭成的几何体如图所示,这个几何体的主视图是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

A <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> B <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> D <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

3.祖国江山美丽如画,川西风光多姿多彩.据四川省某州相关部门通报,“五一”期间,全国各地众多游客前往旅游,共接待游客约1665000人次.将1665000用科学记数法表示应为(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

4.下列计算正确的是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

52024年全国两会公布了2023年国内生产总值,近五年国内生产总值呈逐年上升趋势,分别约为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (单位:万亿元).这五个数据的中位数是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

6.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 平分  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>   

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

7.在平面直角坐标系中,一次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象不经过的象限为(      )

A.第一象限    B.第二象限    C.第三象限    D.第四象限

8.如图,正六边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 内接于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长为(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

A2B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C1D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

9.我国古代数学名著《九章算术》记载了一道题,大意是:几个人合买一件物品,每人出8元,剩余3元;每人出7元,还差4元.设有x人,该物品价值y元,根据题意,可列出的方程组是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

10.二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象如图所示,给出下列结论:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> .其中所有正确结论的序号是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

A①②    B①③    C②③    D①②③

二、填空题

11.分解因式:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>       

12.在菱形ABCD中,AB2,则菱形的周长是   

13.分式方程  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解为       

14.如图,在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,按如下步骤作图:以点B为圆心,适当长为半径画弧,分别交  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点DE分别以点DE为圆心,大于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 长为半径画弧,两弧在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的内部相交于点F,作射线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点G.则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的大小为      度.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

三、解答题

15.(1)计算:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2)解不等式组: ①② <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

16.化简:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

17.某校为丰富课后服务内容,计划开设一些社团活动.受时间限制,每位学生只能参加一类社团活动.为了解学生对舞蹈、声乐、人工智能三类社团活动的喜爱情况,随机选取部分学生进行调查,并根据调查结果,绘制了如图所示的两幅不完整的统计图.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

根据图中信息,回答下列问题:

(1)此次调查一共随机抽取了      名学生,扇形统计图中圆心角  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>       度;

补全条形统计图;

(2)若该校共有400名学生喜欢这三类社团活动,请估计喜欢舞蹈社团活动的学生人数.

18.如图,一艘海轮位于灯塔  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的北偏东  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 方向,距离灯塔100海里的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 处,它沿正南方向航行一段时间后,到达位于灯塔  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的南偏东  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 方向上的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 处.这时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 处距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 处有多远?(参考数据:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

19.如图,在平面直角坐标系  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,已知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两点在反比例函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象上.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

(1)km的值;

(2)连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,并延长交反比例函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象于点C.若一次函数的图象经过AC两点,求这个一次函数的解析式.

20.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> O的弦,C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点,过点C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,交  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的延长线于点D.连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>   

(1)求证:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> O的切线;

(2) <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,求  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的面积.

四、填空题

21.已知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,那么  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的值是          

22.如图,在一个平面区域内,一台雷达探测器测得在点ABC处有目标出现.按某种规则,点AB的位置可以分别表示为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则点C的位置可以表示为      

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

23.某校组织多项活动加强科学教育,八年级(一)班分两批次确定项目组成员,参加“实践探究”活动,第一批次确定了7人,第二批次确定了1名男生、2名女生.现从项目组中随机抽取1人承担联络任务,若抽中男生的概率为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第一批次确定的人员中,男生为      人.

24.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,折叠  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,使点A与点B重合,折痕  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 交于点D,与  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 交于点E,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长为      

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

25.在完成劳动课布置的“青稞生长状态观察”的实践作业时,需要测量青稞穗长.同学们查阅资料得知:由于受仪器精度和观察误差影响,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 次测量会得到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 个数据  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,…,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,如果  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与各个测量数据的差的平方和最小,就将  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 作为测量结果的最佳近似值.若5名同学对某株青稞的穗长测量得到的数据分别是:5.96.06.06.36.3(单位:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ),则这株青稞穗长的最佳近似值为        <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

五、解答题

26.端午节是我国的传统节日,有吃粽子的习俗.节日前夕,某商场购进AB两种粽子共200盒进行销售.经了解,进价与标价如下表所示(单位:元/盒):

种类

进价

标价

A

90

120

B

50

60

(1)设该商场购进A种粽子x盒,销售两种粽子所得的总利润为y元,求y关于x的函数解析式(不必写出自变量x的取值范围);

(2)若购进的200盒粽子销售完毕,总利润不低于3000元,请问至少需要购进A种粽子多少盒?

27.如图,在四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,垂足为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

(1)求证:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

请判断线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的数量关系,并证明你的结论;

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,求  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长.

28.【定义与性质】

如图,记二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象分别为抛物线C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

定义:若抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的顶点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 在抛物线C上,则称  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C的伴随抛物线.

性质:一条抛物线有无数条伴随抛物线;

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C的伴随抛物线,则C也是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线,即C的顶点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上.

【理解与运用】

1)若二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象都是抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>         <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>       

【思考与探究】

2)设函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象为抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

若函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象为抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 始终是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线,求de的值;

若抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> x轴有两个不同的交点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,请直接写出  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的取值范围.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>   

参考答案

一、单选题

1. B

解:根据相反数的定可得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的相反数是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故此答案  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


2. B

解:几何体从前往后看,其主视图

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 故此答案B


3. B

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 1665000用科学数法表示应为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故此答案B


4. C

解:A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 选项错误,不符合意;

B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 选项错误,不符合意;

C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 选项正确,符合意;

D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 选项错误,不符合意.

故此答案C


5. C

解:把句数据按大小序排列  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

五个数据的中位数是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故此答案C


6. B

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 平分  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故此答案B.


7. D

解:由已知,得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 经过第一、二、三象限,

象不经过第四象限.故此答案D


8. C

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是正六形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 三角形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故此答案C


9. A

解: 每人出8元,剩余3元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

每人出7元,4元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故所列方程组为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故此答案A


10. D

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据象可知,二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 象与  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 交点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴负,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故正确,符合意;

根据象可知,二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故正确,符合意;

根据象可知,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 象位于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 下方,即当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,所对应  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故正确,符合意;

上所述,①②③结论正确,符合意.

故此答案D


二、填空题

11.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


12. 8cm

解:由菱形的四条相等可得,菱形的周长为2×4=8cm


13.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,去分母得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,移合并同类项  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

经检验  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是原方程的解.


14.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

根据尺图过程,可知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的角平分线

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


三、解答题

15. 11() <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解: () <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

()①② <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> .由得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,由得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 不等式的解集  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


16.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


17. (1)4054见解析;(2)160

1)解:此次调查一共随机抽取了  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 名学生.

扇形统计图心角  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

此次调查的人数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 名,

全条形统计图如下:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 名,

答:估舞蹈社的学生有160人.


18. B 处距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 处有140海里.

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 海里,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (海里),  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (海里),

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (海里),  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (海里),

答:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 140海里.


19. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

1)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两点在反比例函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 象上.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

将点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,并延交反比例函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 象于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 所在直线的解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,代入得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


20. (1)见解析;(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

1明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> O的弦,C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点,

由垂径定理的推可知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> O的半径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> O的切线

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


四、填空题

21. 1

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


22.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:AB的位置分表示  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C的位置表示  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


23. 5

解:第一批次确定的人中,男生x人,

根据意得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


24. 3

解:由折叠的性,得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

由勾股定理,得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> .


25.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:由意,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与各个量数据的差的平方和  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 有最小  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 青稞穗的最佳近似  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


五、解答题

26. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (2)至少需要购进A种粽子50盒.

1)解:根据  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

答:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的函数解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

故若购进200盒粽子售完不低于3000元,至少需要购进A种粽子50盒.


27. (1)见解析;(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,理由见解析;  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

1明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,理由如下:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


28. 12  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ;(2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

解:(1)二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 象都是抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线上,

代入得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

点坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,整理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

②∵  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> x有两个不同的交点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

得函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线

点坐  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 像上滑

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

抛物线x  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两个点,

点在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 下方,抛物线有两个交点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C的伴随抛物线C也是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的伴随抛物线,即C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上,

点在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 下方  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

上可得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1107/" title="甘孜" class="c1" target="_blank">甘孜</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>