题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125421-61609.gif)
已知点A(15,0),点P是圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125421-13858.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125421-85891.gif)
解析
核心考点
举一反三
设圆满足条件:(1)截y轴所得的弦长为2;(2)被x轴分成两段弧,其弧长的比为3︰1;(3)圆心到直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125416-64720.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125416-75217.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125416-68319.gif)
如图,已知椭圆的中心在坐标原点,焦点在
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125359-36797.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125359-11088.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125400-78806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125400-54455.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125400-38827.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125400-84182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125400-77977.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125401-79556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125401-56416.gif)
(1)求椭圆的标准方程;
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125401-81701.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125400-38827.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125401-39224.gif)
试求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125402-62179.gif)
请考生在第(22)、(23)、(24)三题中任选一题做答,如果多做,则按所做的第一题记分.答时用2B铅笔在答题卡上把所选题目的题号涂黑.
22.选修4-1:几何证明选讲
在
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125352-17197.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125353-38677.gif)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125353-71915.gif)
(2)若AC=3,求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125353-26242.gif)
扇形
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125343-14078.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125344-36819.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125344-19856.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125344-64803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125344-64803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125344-84011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125344-47517.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125345-49999.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125345-26959.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125345-89315.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125345-83226.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125345-79615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125346-16120.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125332-34213.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125332-99175.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125332-97856.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125333-46121.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125333-79521.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125333-56458.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125333-86054.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125334-25444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125334-73264.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125334-32976.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125333-79521.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125334-15569.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125335-42035.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125335-71462.gif)
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