已知椭圆
上一点
到一个焦点的距离为1,则
到另一个焦点的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5d976f1bee17ed409a9de387bd44e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.3 | C.![]() | D.9 |
更新时间:2023-11-10 18:50:44
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】若焦点在
轴上的椭圆
的离心率为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a0c8d67c1b613bfbd988376f6da34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.31 | B.28 | C.25 | D.23 |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】如图,
,
分别是椭圆的左、右焦点,点P是以
为直径的圆与椭圆在第一象限内的一个交点,延长
与椭圆交于点Q.若
,则直线
的斜率为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/5a16b12a-d036-4007-9454-e6e70de15680.png?resizew=188)
![](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/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac81a2e562e05bb08d6fb0f7c7a71fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/5a16b12a-d036-4007-9454-e6e70de15680.png?resizew=188)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐1】若
为椭圆
上的一点,
,
分别是椭圆的左、右焦点,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620c849935b9cac77a3c7668185a9b6a.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/c94fe48bf7af022ecbbe13833fdcc2c8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
【推荐2】过椭圆
的左焦点作斜率为1的弦
,则弦
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf80369ceae912b700e10970a47bb51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次