题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005133-54509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005133-30964.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:依据双曲线的定义
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005134-28785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005134-63084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005134-42236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005135-89052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005135-27571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005135-39279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005136-43317.png)
点评:利用几何性质再结合双曲线的定义是双曲线中常见的求离心率题型,属基础题
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005120-46373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005120-25651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005120-55047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005121-87748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005121-88726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005120-46373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005121-80126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005121-93002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005121-99111.png)
(1)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005121-83526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005122-84469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005122-18433.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005122-65350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005120-46373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005122-67168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005122-35304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005112-18770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005112-38790.png)
已知抛物线C1:y2=4x的焦点与椭圆C2:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-80540.png)
(Ⅰ)在
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-53910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-53910.png)
(Ⅱ)若P是抛物线C1与椭圆C2的一个公共点,且∠PF1F2=
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-83781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-20834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-83781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-51220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005104-53910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005053-23830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005054-70610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005054-90156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005054-89346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005054-25541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005055-48696.png)
A.![]() | B.![]() | C.![]() | D.![]() |
已知直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005036-22759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005036-37744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005036-68438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005036-45544.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005037-21901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005037-15787.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005037-80076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005038-13886.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005038-81005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005038-30486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005038-44603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005038-13886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026005039-28853.png)
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