已知双曲线
:
的左、右焦点分别为
,
,点
在
的右支上,
与
的一条渐近线平行,交
的另一条渐近线于点
,若
,则
的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177ae60ade0b7ac20e7bdc40eaa1ef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16c755ab3fea6ca99b13193a5d7e485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b2dc9682628f6d41f99e449e32f113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.2 | D.![]() |
更新时间:2024-06-03 14:59:53
|
【知识点】 求双曲线的离心率或离心率的取值范围
相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】已知过双曲线
:
左焦点的直线
与双曲线
的右支有公共点,且与圆
相切,则双曲线
的离心率的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/830dae557581905657626ad99f536b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】设
是双曲线
的右焦点,过点
向
的一条渐近线引垂线,垂足为
,交另一条渐近线于点
.若
,则双曲线
的离心率是
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/36a1020cf5024b4192d9197087ba4c1b.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/19389552d8a841ec96d536d17ee8e92b.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/36a1020cf5024b4192d9197087ba4c1b.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/cf9bbe4afc834ba2a5ca5e99e40c86df.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/b3b115e761cf4118b878411243d72bd8.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/5c12a7349a8a4b37ae1255125b2ef9e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb41b4036124524c1b94a6979aea3ff.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572630313705472/1572630319693824/STEM/cf9bbe4afc834ba2a5ca5e99e40c86df.png)
A.![]() | B.2 | C.![]() | D.![]() |
您最近一年使用:0次