题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171557-48088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171557-76814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171558-88991.png)
(1)求椭圆的标准方程;
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171558-74753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171558-70396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171558-74753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171558-28932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171559-68505.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171559-35552.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171559-36411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171559-54436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171559-37882.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171558-28932.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171600-23255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171600-45164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171600-57720.png)
化简得:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171600-39934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171601-62287.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171601-62097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171601-33487.png)
解析
核心考点
试题【已知椭圆中心在原点,焦点在轴上,离心率,过椭圆的右焦点且垂直于长轴的弦长为(1)求椭圆的标准方程;(2)为椭圆左顶点,为椭圆上异于的任意两点,若,求证:直线过定】;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/20191023/20191023171548-51224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171548-60143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171548-33880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171549-45296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171549-78830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171549-95046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171549-48052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171549-79459.png)
A.9 | B.7 | C.5 | D.3 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171536-54177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171537-79090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171537-59035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171537-51602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171537-76702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171537-25065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171537-29259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171538-52752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171538-12159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171538-77388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171538-14575.png)
(1)求椭圆的标准方程;
(2)若点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171539-80709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171539-22851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171539-77265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171539-63757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171539-22851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171540-49007.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171530-22282.png)
A.1 | B.2 | C.![]() | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171513-95963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171513-46037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171513-18221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171514-97605.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171514-28752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171514-29363.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171515-81461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171515-29951.png)
(Ⅱ)在
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171515-16603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171515-98129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171516-28067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171515-98129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023171504-40506.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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