题目
题型:不详难度:来源:
A.(![]() ![]() | B.(![]() ![]() |
C.(-![]() ![]() | D.(-![]() ![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051332-26025.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051332-67638.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051325-33926.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051326-34466.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051322-30482.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051322-42713.gif)
(1)求此双曲线的离心率;
(2)若此双曲线过N(,2),求此双曲线的方程
(3)若过N(,2)的双曲线的虚轴端点分别B1,B2(B2在x轴正半轴上),点A、B在双曲线上,且
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051322-79080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051322-73205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051314-23435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051314-28147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051314-85630.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051315-34099.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051315-78099.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051315-18450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051315-54382.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051314-85630.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051309-69014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051309-36782.gif)
(1)求双曲线的方程;
(2)直线l过坐标原点O且和双曲线交于两点M、N,点P为双曲线上异于M、N的一点,且直线PM,PN的斜率均存在,求kPM·kPN的值.
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051252-28417.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051252-24549.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051252-34024.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051253-76196.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051253-77860.gif)
(I)求线段
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051253-14169.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051253-99356.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-77435.gif)
(II)过点
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-72760.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-18641.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-77435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-92429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051255-31443.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051255-39372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-92429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051255-91697.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024051254-18641.gif)
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