已知椭圆
,点
是椭圆的左、右焦点,点
是椭圆上一点,
的内切圆的圆心为
,若
,则椭圆的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cfd997d3b66a3b8f7731b26f0ab0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783654527a3eee5ce55dafbbb7634d2c.png)
更新时间:2023-07-26 07:06:39
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【推荐1】已知椭圆C:
1
的左、右焦点分别为
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,点
在椭圆
上,其中
,若
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,则椭圆
的离心率的取值范围为_____ .
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【推荐2】已知
,
为椭圆E的左、右焦点,斜率为
的直线
与椭圆E交于为B、P,若以
为直径的圆过点
,则椭圆E的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
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【推荐1】已知
分别为椭圆
的左、右焦点,
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上的一点,且
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与椭圆相交于点
,则
与
的面积的比值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507bea07e21f8fdff64a5def2b9f82d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c30a7506331e47342fb1e7d2e12d041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4085b194990fc17f8073878b8eca1a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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【推荐2】已知椭圆
(
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的直线与C交于A,B两点,且
,若
的面积为
,其中O为坐标原点,则
的值为________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e5eef507bea6bc19bc2f3d66c67548.png)
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