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【327851】2023年辽宁省锦州市中考数学真题

时间:2025-01-20 20:28:54 作者: 字数:19843字
简介:

绝密★启用前

202023-2023年辽宁省锦州市中考数学真题


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/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的相反数是(      )

A  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> C  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> D  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

2.如图所示的几何体是由5个完全相同的小正方体搭成的,它的俯视图是(      )

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

A <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     B <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     C <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

3.下列运算正确的是(      )

A  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     C  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     D  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

4.如图,将一个含  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 角的直角三角板按如图所示的位置摆放在直尺上.若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,则  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的度数为(      )

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

A  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     C  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     D  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

5.在一次跳绳测试中,参与测试的10名学生一分钟跳绳成绩如下表所示:

成绩/

129

130

132

135

137

人数

1

3

2

2

2

10名学生跳绳成绩的中位数和众数分别为(      )

A132130    B132132    C130130    D130132

6.若关于x的一元二次方程  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 有两个实数根,则k的取值范围是(      )

A  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

C  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     D  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

7.如图,点ABC  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的半径为3,则扇形  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (阴影部分)的面积为(      )

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

Aπ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     Bπ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     Cπ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     Dπ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

8.如图,在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 在同一条直线上,点C与点E重合.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 以每秒1个单位长度的速度沿线段  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 所在直线向右匀速运动,当点B运动到点F时,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 停止运动.设运动时间为t秒,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 重叠部分的面积为S,则下列图象能大致反映St之间函数关系的是(      )

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

A <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     B <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

C <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

二、填空题

9.近年来,跑步成为越来越多人的一种生活方式.据官方数据显示,2023年上海半程马拉松报名人数达到78922人.将数据78922用科学记数法表示为              

10.因式分解:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>          

11.甲、乙、丙三名运动员在5次射击训练中,平均成绩都是8.5环,方差分别是  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,则三名运动员中这5次训练成绩最稳定的是         .(填“甲”或“乙”或“丙”)

12.一个不透明的盒子中装有若干个红球和  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 个黑球,这些球除颜色外均相同.经多次摸球试验后发现,摸到黑球的频率稳定在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 左右,则盒子中红球的个数约为              

13.如图,在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的垂直平分线交  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点D,交  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点E,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,则  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的度数为         

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

14.如图,在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,按下列步骤作图:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上分别截取  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,使  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 分别以点D和点E为圆心,以大于  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的长为半径作弧,两弧在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 内交于点M作射线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点F.若点P是线段  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上的一个动点,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,则  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的最小值是        

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

15.如图,在平面直角坐标系中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的边  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> y轴上,点C在第一象限内,点B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的中点,反比例函数  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的图象经过BC两点.若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的面积是6,则k的值为       

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>     

16.如图,在平面直角坐标系中,四边形  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…都是平行四边形,顶点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…都在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 轴上,顶点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…都在正比例函数  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> )的图象上,且  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…,分别交射线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,…,得到  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,….若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,则  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的面积为              

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

三、解答题

17.化简,再求值:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,其中  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

182023年,教育部等八部门联合印发了《全国青少年学生读书行动实施方案》,某校为落实该方案,成立了四个主题阅读社团:A.民俗文化,B.节日文化,C.古曲诗词,D.红色经典.学校规定:每名学生必须参加且只能参加一个社团.学校随机对部分学生选择社团的情况进了调查.下面是根据调查结果绘制的两幅不完整的统计图.

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

请根据图中提供的信息,解答下列问题:

(1)本次随机调查的学生有    名,在扇形统计图中“A”部分圆心角的度数为    

(2)通过计算补全条形统计图;

(3)若该校共有1800名学生,请根据以上调查结果,估计全校参加“D”社团的人数.

19.垃圾分类工作是今年全国住房和城乡建设工作会议部署的重点工作之一.为营造人人参与垃圾分类的良好氛围,某市环保部门开展了“让垃圾分类成为低碳生活新时尚”宣传活动,决定从ABC三名志愿者中通过抽签的方式确定两名志愿者到社区进行垃圾分类知识宣讲,抽签规则:将三名志愿者的名字分别写在三张完全相同且不透明卡片的正面,把三张卡片背面朝上,洗匀后放在桌面上,先从中随机抽取一张卡片,记下名字,再从剩余的两张卡片中随机抽取第二张卡片,记下名字.

(1)从三张卡片中随机抽取一张,恰好是“B志愿者”的概率是    

(2)按照抽签规则,请你用列表法或画树状图法表示出两次抽签所有可能的结果,并求出AB两名志愿者同时被抽中的概率.

202023515日,辽宁男篮取得第三次CBA总冠军,辽篮运动员的拼搏精神感染了众多球迷.某校篮球社团人数迅增,急需购进AB两种品牌篮球,已知A品牌篮球单价比B品牌篮球单价的2倍少48元,采购相同数量的AB两种品牌篮球,分别需要花费9600元和7200元.求AB两种品牌篮球的单价分别是多少元?

21.如图1,是某校教学楼正厅一角处摆放的“教学楼平面示意图”展板,数学学习小组想要测量此展板的最高点到地面的高度.他们绘制了图2所示的展板侧面的截面图,并测得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,底座四边形  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 为矩形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .请帮助该数学学习小组求出展板最高点A到地面  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的距离.(结果精确到  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .参考数据:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

22.如图,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的直径,点C  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 相切于点A,与  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的延长线交于点B,过点B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,交  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的延长线于点D

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

(1)求证:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

(2)F  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上一点,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 交于点G.若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,求  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的半径及  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的长.

23.端午节前夕,某批发部购入一批进价为8/袋的粽子,销售过程中发现:日销量y(袋)与售价x(元/袋)满足如图所示的一次函数关系.

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

(1)yx之间的函数关系式;

(2)每袋粽子的售价定为多少元时,所获日销售利润最大,最大日销售利润是多少元?

24.【问题情境】如图,在  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .点D在边  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上将线段  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 绕点D顺时针旋转得到线段  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (旋转角小于  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ),连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,以  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 为底边在其上方作等腰三角形  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,使  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,连接  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

【尝试探究】

1)如图1,当  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 时,易知  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

如图2,当  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 时,则  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的数量关系为               

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

2)如图3,写出  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的数量关系(用含α的三角函数表示),并说明理由.

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

【拓展应用】

3)如图4,当  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,且点BEF三点共线时.若  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,请直接写出  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的长.

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

25.如图,抛物线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 轴于点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,交  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 轴于点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,顶点为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

(1)求抛物线的表达式;

(2)若点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 在第一象限内对称轴右侧的抛物线上,四边形  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的面积为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,求点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的坐标;

(3)在(2)的条件下,若点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是对称轴上一点,点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是坐标平面内一点,在对称轴右侧的抛物线上是否存在点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,使以  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 为顶点的四边形是菱形,且  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,如果存在,请直接写出点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的坐标;如果不存在,请说明理由.

参考答案

一、单选题

1. B

解:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的相反数是  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

故此答案B


2. B

几何体的俯视图所示.B

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   


3. B

A <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,故A选项错误B <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,故B选项正确,C <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,故C选项错误D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,故D选项错误.B


4. C

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,直尺的对边平行, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .C

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


5. A

这组数据的中位数  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 这组数据中130次数最多,众数130.A


6. D

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 一元二次方程, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 一元二次方程有两个数根, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .D


7. D

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,又 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的半径3扇形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (阴影部分)的面积为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故D


8. A

1D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> H

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

1

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,如2,重叠部分 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,此 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

2

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,即  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,如3,重叠部分  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,此  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

3

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,即  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,如4,重叠部分  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,此  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

4

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,即  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

上, ,,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 符合意的函数象是选项A.故A


二、填空题

9.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故答案  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


10.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故答案  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

【点睛】该题了因式分解——提取公因式法,掌握知点是解


11.

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,平均成都是8.5 乙甲丙 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

三名运动员5训练定的是乙.故答案乙.


12.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

解:袋子中球有  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 个,

根据意,得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

盒子中球的个数约为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

【知】概率公式:P(黑球)=黑球数量÷黑球和白球数量.


13.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> / <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的垂直平分线

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,又  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故答案  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


14.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

P <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点QC <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点H

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

意知: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 平分  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> C,P,Q三点共线,且与  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 垂直  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 最小,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的最小值为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,即  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的最小值为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故答案  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


15. 4

BC两点分y的垂线,垂足分别为DE

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

B点坐标为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> B  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的中点,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> C点坐标为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的解析式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 解得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的解析式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> A点坐标为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,根据意得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故答案4


16.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 与点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的横坐相同, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 都是平行四形, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,同理可得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 上,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .故答案  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


三、解答题

17.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

原式 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,原式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


18. (1)60  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (2)见解析;(3)540

1)本次调查人数  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (名),

扇形统计图中,C对应的扇形的心角度数是  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

故答案60  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

2  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (人);

全条形统计图如答案所示.

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

3  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (名).

答:全校1800名学生中,参加D”的学生540名.


19. (1)  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (2)  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

1)从三卡片中随机抽取一,恰好是B志愿者的概率是 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

故答案  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

2)方法一:根据意可画如下:

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

可知共有6果,每种果出的可能性相同,其中AB两名志愿者同中的有2种,

PAB两名志愿者同中)  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

方法二:根据意可列表如下:


A

B

C

A


A,B

(A,C)

B

(B,A)


(B,C)

C

(C,A)

(C,B)


由表格可知共有6果,每种果出的可能性相同,其中AB两名志愿者同中的有2种,

PAB两名志愿者同中)  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


20. A品牌篮球单价为96元,B品牌篮球单价为72.

B品牌x元,A品牌  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 元,

根据意,得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

个方程,得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

经检验  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是所列方程的根,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> (元).

所以,A品牌96元,B品牌72元.


21.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

A <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点G,与直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 交于点HB <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点MD <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点N

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,四 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 矩形,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

答:展板最高点A到地面  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的距离  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


22. (1)见解析;(2) <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的半径为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

1明:如1

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

1

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的直径, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 相切于点A

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

2  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> D  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,交  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 长线于点M,如2

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

2

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的半径r

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,即  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


23. (1)  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ;(2)当粽子的售价定为12.5/袋时,日销售利润最大,最大日销售利润是810.

1一次函数的解析式 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 代入得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 解得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

yx的函数解析式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

2售利润为w

意得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> w有最大,最大值为810

当粽子的售价定12.5/,日售利最大,最大日售利810元.


24. 1 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ;(2 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,理由见解析;(3 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

1)如1A  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点H

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

1

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是以  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的等腰三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> H  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的中点,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

2  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

2A  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点H

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

2

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是以  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的等腰三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> H  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的中点,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

3  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

方法一:

3D  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点MC  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,交  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 长线于点H

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

3

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> D顺时针得到线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是以  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的等腰三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 负值舍去),  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

方法二:

4C  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 长线于点GD  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点ME  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点H

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>   

4

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> D顺时针得到线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是以  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的等腰三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 中,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 负值舍去),  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>


25. (1) <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ;(2) <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ;(3)存在,点G的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

1抛物线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 经过  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 解得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

抛物线的表达式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

2)方法一:如1  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

1

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 解得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的表达式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

整理得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> .

方法二:

2

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

2

抛物线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 交于点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 于点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

形梯形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

整理得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,解得  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

3)存在,点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的坐标为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

3  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

3

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是菱形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是等三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 与点  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 关于  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 称,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是等三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,即  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

∴ ≌ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的表达式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

与抛物线表达式立,得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 标为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

4  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

4

同理可  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是等三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 是等三角形,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

∴ ≌ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> ,

线  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的表达式  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

与抛物线表达式立得 ,, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a> 的坐标为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/990/" title="辽宁省" class="c1" target="_blank">辽宁省</a> <a href="/tags/1056/" title="锦州" class="c1" target="_blank">锦州</a> <a href="/tags/1122/" title="辽宁" class="c1" target="_blank">辽宁</a>