已知
,
分别为双曲线
的左右焦点,
是
上的一点,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de66df5b4cd1344339588b99bf7214a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1778997d73c0d3bb80d3561772584327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5ecc35b2ad878d62f4c4210023de15.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() ![]() |
更新时间:2020-03-02 21:57:29
|
【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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单选题
|
较易
(0.85)
名校
【推荐1】双曲线
上的点
到左焦点的距离为9,则
到右焦点的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad47527f61f73c6139c786741bbb9130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.15 | B.3 | C.3或15 | D.5或12 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知双曲线
的左右焦点分别为
,
,若双曲线左支上有一点
到右焦点
距离为
,
为
的中点,
为坐标原点,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d49e09b17b19d7c787e95bcf1e9731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183b6a0cef4256c9696a5bca31053da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9720fce0136a1c2a5d2919c30e041bd0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次