20-21高三下·上海浦东新·阶段练习
名校
解题方法
1 . 在双曲线C:
中,
、
分别为双曲线C的左右两个焦点,P为双曲线上且在第一象限内的点,
的重心为G,内心为I.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/39188e0c-dd0b-44b2-acbe-c03fb6fe6782.png?resizew=196)
(1)求内心I的横坐标;
(2)已知A为双曲线C的左顶点,直线l过右焦点
与双曲线C交于M、N两点,若
、
的斜率
、
满足
,求直线l的方程;
(3)若
,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dad0c75ce33673ec4c425896e8619e4.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/33d776753746914c2410a3946c357f35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/39188e0c-dd0b-44b2-acbe-c03fb6fe6782.png?resizew=196)
(1)求内心I的横坐标;
(2)已知A为双曲线C的左顶点,直线l过右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.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/c33c3b37aa383f2a8f60af894ae69c40.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9849443c412a0ae35a5810e0b1dfebd.png)
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