解题方法
1 . 已知椭圆
的左、右焦点分别为
、
,点P在直线
上且不在x轴上,直线
与椭圆E的交点分别为A、B,直线
与椭圆E的交点分别为C、D.
(1)设直线
、
的斜率分别为
、
,求
的值![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e707a7bea901a3af6aef3cd43ac685e3.png)
(2)问直线m上是否点P,使得直线OA,OB,OC,OD的斜率
,
,
,
满足
若存在,求出所有满足条件的点P的坐标
若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19fec115195f8098a290625f7d9e762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6758b8b074d33ea9e82818593656e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d53395f0a95c4343c04c5773fc1147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b741984b445c2bcb6005c24ac82aa829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b55f4ca2d21088854e1aeb040fa950.png)
(1)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b741984b445c2bcb6005c24ac82aa829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b55f4ca2d21088854e1aeb040fa950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f375dc5addedc5f9fbb72d566939c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731f980ccb6f902d460d0ea2920bfe2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8d6942a114ec814822d36bc74bf671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e707a7bea901a3af6aef3cd43ac685e3.png)
(2)问直线m上是否点P,使得直线OA,OB,OC,OD的斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5da2a0ccfb3a967d20ed2272a5768b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59cf9b8f015e9a786037751932bacfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2147a7cbea552fda960d57b54c17b8cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bbcbce4f4f2518471093a1aac5113d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd63b6a5d48e6d7efb5edb033abaf09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e707a7bea901a3af6aef3cd43ac685e3.png)
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