名校
解题方法
1 . 已知椭圆
的左、右焦点分别为
为
上一点,且
,若
,
的外接圆面积是其内切圆面积的25倍,则椭圆
的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b76e364a93cd78537c6c97b88021f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ed463bf16c78a4bbb9d3acff922afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7affd8a277498fd39b4a2a95d649f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141fb75b0807d4428756cdb2437adf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
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2 . 如图,设椭圆
1的左右焦点分别为F1、F2,过焦点F1的直线交椭圆于A、B两点,若△ABF2的内切圆的面积为4,设A、B两点的坐标分别为A(x1,y1),B(x2,y2),则|y1﹣y2|值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4627e4a85c2aa6b951e3e2791b502bfa.png)
![](https://img.xkw.com/dksih/QBM/2020/1/4/2370083763609600/2371974466314240/STEM/2757941f-5f7b-471f-aeb8-b33321bffb57.png)
您最近一年使用:0次