题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171722-54322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171722-69758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171723-76879.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171723-16760.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171723-59456.png)
(2)是否存在平行于
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171723-84005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-40377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-40377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171723-59456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-46074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-20270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-40377.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-64004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171725-28408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171725-82453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171725-89203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171725-91232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171725-56810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171726-95596.png)
由(1)(2)解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171726-41223.png)
椭圆的方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171726-40440.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171723-84005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171726-42278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-40377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171726-55438.png)
联立方程组
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171727-42209.png)
整理得
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171727-97908.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-46074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171727-49972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171727-69501.png)
以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-20270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171727-58592.png)
该圆经过原点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171728-73752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171728-11376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171728-15119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171728-50199.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171729-63860.png)
经检验,所求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171724-40377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171729-82746.png)
解析
核心考点
试题【已知中心在原点的椭圆的一个焦点为为椭圆上一点,的面积为(1)求椭圆的方程;(2)是否存在平行于的直线,使得直线与椭圆相交于两点,且以线段为有经的圆恰好经过原点?】;主要考察你对椭圆的定义与方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171716-38092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171716-16562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171704-27838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171645-82943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171645-77865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171646-84032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171646-95467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171646-73470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171646-10252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171646-61612.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171637-64341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171637-46463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171638-37213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171638-54452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171638-55880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171638-27976.png)
A.4 | B.8 | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171621-38537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171621-59000.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171621-23900.png)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171621-44937.png)
(Ⅱ)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171621-29113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171621-44937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171622-73397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171622-51002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171622-46283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171623-56708.png)
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