题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053133-48841.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053133-25784.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-50488.gif)
小题1:求该双曲线的方程;
小题2:如题(20)图,点
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-55434.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-71096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-80691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-40907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053135-74428.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053135-47558.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053135-74428.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053135-34853.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053135-96842.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053136-95966.jpg)
小题1:由题意可知,双曲线的焦点在
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053136-32523.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053136-46408.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053136-97582.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053133-25784.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053136-84987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-50488.gif)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053137-64502.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053137-38071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053137-41738.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053137-59178.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053138-67902.gif)
小题2:设点D的坐标为
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053138-12662.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053138-55131.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053138-73823.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053138-47542.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-80691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053134-40907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053139-67643.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053139-55523.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053139-91768.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053139-51925.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053140-47963.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053140-28820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053138-47542.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053140-90767.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053140-63747.gif)
由方程组
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053140-69309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053141-46202.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053135-74428.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053141-34844.gif)
解析
核心考点
试题【已知以原点为中心的双曲线的一条准线方程为,离心率.小题1:求该双曲线的方程;小题2:如题(20)图,点的坐标为,是圆上的点,点在双曲线右支上,求的最小值,并求此】;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
A.![]() | B.-4 | C.4 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053125-24192.gif)
A.![]() | B.1 | C.3 | D.6 |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053119-72407.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053119-55405.gif)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024053116-79764.gif)
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