来自李传荣的问题
椭圆x2a2+y2b2=1(a>b>0),点A为其上任意一点,左右焦点为F1,F2,若|AF1|,|F1F2|,|AF2|成等差数列,则此椭圆的离心率为______.
椭圆x2a2+y2b2=1(a>b>0),点A为其上任意一点,左右焦点为F1,F2,若|AF1|,|F1F2|,|AF2|成等差数列,则此椭圆的离心率为______.
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2020-02-10 12:40