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椭圆中abc是怎样定义的

更新时间: 2020-09-18 00:00:00     

1、2a是长轴长,也是椭圆中任意一点到两个焦点的距离之和;

2、2c是焦距,是两个焦点间的距离;

3、2b是短轴长,满足b²=a²-c²。

关键词: 椭圆 abc 怎样 定义

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