1 . 若实轴长为2的双曲线
上恰有4个不同的点
满足
,其中
,
,则双曲线C的虚轴长的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad29d7c31087e13e266793832af17bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de25799b89e589407065dae98d61d086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5a6ad215584ca01895369b13dadec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-08-01更新
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7卷引用:安徽省皖西南联盟2018-2019学年高二下学期期末联考数学(理)试题