名校
1 . 已知椭圆C的中心在坐标原点,焦点在x轴上,左顶点为A,左焦点为
,点
在椭圆C上,直线
与椭圆C交于E,F两点,直线AE,AF分别与y轴交于点M,N
Ⅰ
求椭圆C的方程;
Ⅱ
在x轴上是否存在点P,使得无论非零实数k怎样变化,总有
为直角?若存在,求出点P的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2a3a20f2715f640eab19553ee20395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57263eb46061de34df3c52814cfc1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c42d7b8e1d3221fc8b8074c9a090270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba441131061f773ab758b740dae3ad9f.png)
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2016-12-04更新
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4卷引用:【市级联考】宁夏中卫市2019届高三下学期第一次模拟考试数学(文)试题