如图,已知
是双曲线
的左、右焦点,过点
作以
为圆心,
为半径的圆的切线,
为切点,若切线段
被一条渐近线平分,则双曲线的离心率为
![](https://img.xkw.com/dksih/QBM/2018/3/4/1894848623091712/1896580077240320/STEM/834a598af6164015924d90d7fc021036.png?resizew=188)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19055832a5b216ab4c700d60db1ac926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://img.xkw.com/dksih/QBM/2018/3/4/1894848623091712/1896580077240320/STEM/834a598af6164015924d90d7fc021036.png?resizew=188)
A.2 | B.![]() | C.![]() | D.![]() |
更新时间:2018-03-06 23:44:57
|
【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)
名校
【推荐1】若双曲线
(
,
)的一条渐近线被圆
截得的弦长为
,则双曲线的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942f0cebbb25002af13b9468b3802100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda48853e8bdb7e266370b4e0d5a258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229d55eeae0ce82c467bd1e5686d8ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2c413458ef718d60ba0d51e991e71b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
解题方法
【推荐2】设
,
是双曲线
的左、右焦点,
是坐标原点.过
作
的一条渐近线的垂线,垂足为
.若
,则
的离心率为( )
![](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/2a332e25179c28a55864439a1ea3a038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/0696d0bce093cf527281aa8d7fe376ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次