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解题方法
1 . 已知曲线
的左右焦点为
,P是曲线E上一动点
(1)求
的周长;
(2)过
的直线与曲线E交于AB两点,且
,求直线AB的方程;
(3)若存在过点
的两条直线
和
与曲线E都只有一个公共点,且
,求h的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828541b05b0287296275ab2a716a19ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a7681c38f74e21181bb9de077b0c0e.png)
(3)若存在过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb977f1e7d579c281d9541670882f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
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