题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000006-72839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000007-36123.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000007-61031.png)
解析
试题分析:因为,双曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000006-72839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000007-36123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000007-11086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000007-52758.png)
故a="2,b="
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000008-23562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000007-61031.png)
点评:中档题,涉及圆锥曲线问题,往往需要利用a,b,c,e的关系,要注意掌握离心率的不同表现形式。
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000008-58015.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000000-31099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000000-56217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000000-60793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000000-92880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000001-29690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000001-28464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000001-93314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000001-82689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000001-30838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000002-48924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000002-19619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000000-92880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000002-42876.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000002-24774.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000003-54449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000001-28464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000003-78549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191026000003-19531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235950-84026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235950-27947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235950-20900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235951-26744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235951-90174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235950-27947.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235951-34413.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235951-69940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235951-34413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235951-59678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235940-63032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235942-88941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235942-45984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235942-31212.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235943-42447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235943-92587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235943-50799.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235930-59186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235930-95275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235924-99705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235924-44227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235924-44038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025235924-95914.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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