题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-68165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-13037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-68165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-66793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-61268.jpg)
(Ⅰ)求椭圆的方程;
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-22750.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-72946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-13221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170409-62086.png)
由题意
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-44728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-84156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-25610.png)
∴椭圆方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-91893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-93715.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-40135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-99924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-77614.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170410-93377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170411-56751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170411-76742.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170411-51940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170411-20091.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170411-26018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170412-78894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170412-57716.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170412-97666.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170412-70549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170412-98152.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170413-61060.png)
∴当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170413-76901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170413-59762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170413-17677.png)
解析
核心考点
试题【(本小题满分12分)如图,椭圆的中心在坐标原点,其中一个焦点为圆的圆心,右顶点是圆F与x轴的一个交点.已知椭圆与直线相交于A、B两点.(Ⅰ)求椭圆的方程;(Ⅱ)】;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/20191023/20191023170358-52256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170358-69167.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170359-70654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170359-67751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170359-49252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170359-65976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-61217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-56136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-92202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-40688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-82272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-88214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-50314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-38889.png)
(1)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-88214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-53660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-83285.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-54715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170342-88214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-55082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-90660.png)
(3)在
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-53660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-30742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170344-60771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170344-52425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170343-30742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170334-71411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170334-62345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170334-48392.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170326-93777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170326-52474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170326-18602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170326-40350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170327-84494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170320-63712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170320-78818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023170320-22816.png)
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