已知直线l:
经过椭圆C:
的左焦点
,且与椭圆C相交于M,N两点,
为椭圆的右焦点,
的周长为16,则此椭圆的短轴长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32c935806559b1a913a7edb3c804999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.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/5585a42c8f07ad90b94ace9db3d78994.png)
22-23高二上·重庆·期末 查看更多[3]
重庆市部分区2022-2023学年高二上学期期末联考数学试题河南省开封市五县2023-2024学年高二上学期联考数学试题(已下线)2.2.1 椭圆的标准方程(十三大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
更新时间:2023-11-14 11:18:29
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【知识点】 椭圆中焦点三角形的周长问题
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解题方法
【推荐1】椭圆
的左、右焦点分别为
,
,过
且斜率大于0的直线l与C相交于A,B两点.若
内切圆的半径为
,则l的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
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【推荐2】椭圆
的左、右焦点分别为
、
,弦
过点
,若
的内切圆周长为
,
,
两点的坐标分别为
,
,则
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b939a0c044b842cdc258e516a6d1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
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