已知双曲线
,过左焦点且与
轴垂直的直线与双曲线交于
、
两点,若弦
的长恰等于实铀的长,则双曲线的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
21-22高二上·内蒙古呼和浩特·期末 查看更多[2]
更新时间:2022-02-21 13:58:05
|
【知识点】 求双曲线的离心率或离心率的取值范围
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单选题
|
较易
(0.85)
解题方法
【推荐1】已知点
是双曲线
:
(
,
)的左支上一点,
、
分别是双曲线的左、右焦点,且
,
与两条渐近线相交于
、
两点(如图所示),点
恰好平分线段
,则双曲线
的离心率为( )
![](https://img.xkw.com/dksih/QBM/2020/12/6/2608418385731584/2609009941929984/STEM/24a073d8098143bca55fca35652996cd.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.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/c2427943a38dcd93c9ec9b735ffc9fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/12/6/2608418385731584/2609009941929984/STEM/24a073d8098143bca55fca35652996cd.png?resizew=182)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐2】若实数数列1,b,81成等比数列,则圆锥曲线x2+
=1的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae505f442314108d69af36b68bbf3d.png)
A.![]() ![]() | B.![]() ![]() | C.![]() | D.![]() |
您最近一年使用:0次