已知点
为椭圆
:
上一点,
,
是
上关于坐标原点对称的两点.设直线
,
的斜率分别为
,
,且
,则椭圆
的一个焦点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d974fd930f30b91a5b851872763be791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d0b20880f4f6120dca1efdec01cbd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-12-26 23:23:53
|
【知识点】 求椭圆的焦点、焦距
相似题推荐
单选题
|
适中
(0.65)
【推荐1】下列说法正确的个数是( )
①一组数据的标准差越大,则说明这组数据越集中;
②曲线
与曲线
的焦距相等;
③在频率分布直方图中,估计的中位数左边和右边的直方图的面积相等;
④已知椭圆
,过点
作直线,当直线斜率为
时,M刚好是直线被椭圆截得的弦AB的中点.
①一组数据的标准差越大,则说明这组数据越集中;
②曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b1e9335ee7fb16c2bc6f12aed687d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aedb77af724990155b99c6b7e57ff93.png)
③在频率分布直方图中,估计的中位数左边和右边的直方图的面积相等;
④已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b220121afbcf2de3701880109b4c6143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63a8a4251367266b552521393d8e35a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78fd95f89dec2d373fa57f02acd739f.png)
A.1 | B.2 | C.3 | D.4 |
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单选题
|
适中
(0.65)
名校
解题方法
【推荐2】椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfabfb42f41372aaa11677d9d47be77.png)
=1的一个焦点为F,过原点O作直线(不经过焦点F)与椭圆交于A,B两点,若△ABF的面积是20,则直线AB的斜率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfabfb42f41372aaa11677d9d47be77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3027606801dc0bc0647bc40156c688ac.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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