两个正数a、b的等差中项是
,一个等比中项是
,且
则双曲线
的离心率e等于___________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ce26e1400660921a4e059819c78924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
14-15高二上·河南许昌·期末 查看更多[2]
更新时间:2016-12-02 19:15:22
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