已知双曲线
上有一点P到一个焦点距离为12,则到另一个焦点的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a0bd4bd9985f1e367c100b453ed03f.png)
A.4或20 | B.20 | C.4 | D.6或18 |
20-21高二上·宁夏·阶段练习 查看更多[2]
更新时间:2020-12-27 01:46:54
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【知识点】 利用双曲线定义求点到焦点的距离及最值
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【推荐1】已知点
是双曲线
的上焦点,
是
下支上的一点,点
是圆
上一点,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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A.7 | B.6 | C.5 | D.![]() |
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【推荐2】已知双曲线
的一条渐近线方程为
,
,
分别是双曲线
的左,右焦点,点
在双曲线
上,且
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc29f6d8fc09a2f9644127398d76233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b129ea72bcaf07556f52924a86e4f870.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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