已知椭圆C:
的离心率为
,以椭圆C的右顶点A为圆心,作半径为r的圆
,设圆A与椭圆C交于点E,F.
(1)求
的最小值,并求此时圆A的方程;
(2)设点O是坐标原点,点P是椭圆C上异于E,F的点,且满足直线PE,PF分别与x轴交于M,N两点,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6877cb050185e7141e1bf5f5170364c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7173b357dec0dca7d6da123345089741.png)
(2)设点O是坐标原点,点P是椭圆C上异于E,F的点,且满足直线PE,PF分别与x轴交于M,N两点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43995a8753fb39e768bc0e04a0e2a7b3.png)
更新时间:2022-05-11 14:14:32
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【推荐2】已知向量
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【推荐1】已知椭圆
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解题方法
【推荐2】已知椭圆
的中心在原点,焦点在
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交椭圆
于点
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的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
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【推荐2】已知椭圆
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