题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023815-38361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-59237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023815-38361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-59237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-21475.png)
(1)求椭圆C的方程;
(2)过
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023815-38361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-45686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-59237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-91082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-45686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-44992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-59237.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023817-37349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023817-63651.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023817-37349.png)
(2)以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-59237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-91082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023817-75448.png)
①当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-45686.png)
②当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-45686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-45686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023817-15896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023818-34110.png)
代入椭圆方程得:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023818-65704.png)
又直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-45686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023816-59237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023818-30435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023818-32229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023817-63651.png)
【考点定位】本题考查椭圆的定义和方程、圆的方程、点到直线的距离公式等知识,考查考生的运算能力以及运用方程思想解题的能力.
核心考点
试题【(15分)已知椭圆C的对称中心为原点O,焦点在x轴上,左右焦点分别为和,且||=2,点(1,)在该椭圆上.(1)求椭圆C的方程;(2)过的直线与椭圆C相交于A,】;主要考察你对圆的方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023809-16639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023809-16466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023810-53531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023810-51435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023810-50812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023810-29837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023803-98337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023801-95363.png)
A.(2,3) | B.(-2,3) | C.(-2,-3) | D.(2,-3) |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023755-96795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023747-16486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023747-17324.png)
(1)求圆O的方程;
(2)圆O与
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023747-41844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023747-33517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023748-91663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023748-72569.png)
求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023023748-40455.png)
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