双曲线
的离心率为3,则
=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60e3a9c8c31ba3f0a3231d86499c40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0be44077d42cfffece905b1af13e000.png)
更新时间:2023-02-18 22:11:45
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【知识点】 根据离心率求双曲线的标准方程
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