已知双曲线
:
的实轴长是虚轴长的2倍,则
的离心率为_______________ .
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2022-07-15 10:38:55
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【知识点】 求双曲线的离心率或离心率的取值范围
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