题目
题型:不详难度:来源:
设双曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044504-22259.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044504-90668.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044504-40681.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044505-13535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044505-39964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044505-92686.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044505-43135.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044505-43140.jpg)
(1) 证明:无论
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-52449.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-13145.gif)
(2) 设动点
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-11346.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-79439.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-11346.gif)
答案
(1)证明略
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-65679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044507-75001.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044507-35576.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044507-62729.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044507-70866.gif)
同理可得
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044507-77556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044508-15390.gif)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044508-82568.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044505-13535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044508-14699.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044508-93522.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044509-42736.gif)
(2) ∵
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-79439.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-11346.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044509-32856.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044509-17195.gif)
则有
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044509-68739.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044510-93994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044506-65679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044507-75001.gif)
核心考点
试题【(本小题满分12分)设双曲线的右顶点为是双曲线上异于顶点的一个动点,从引双曲线的两条渐近线的平行线与直线(为坐标原点)分别交于和两点.(1) 证明:无论点在什么】;主要考察你对双曲线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/20191024/20191024044459-88834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044457-85505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044457-59738.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044452-53317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044453-33883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044448-47329.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044448-28680.png)
A.![]() | B.2 | C.![]() | D.1 |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044439-23139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044439-43576.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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