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椭圆c怎么求

更新时间: 2020-10-23 00:00:00     

根据椭圆的标准方程x^2/a^2+y^2/b^2=1,(a>b>0),可求得c。椭圆是平面内到定点F1、F2的距离之和等于常数(大于|F1F2|)的动点P的轨迹,F1、F2称为椭圆的两个焦点。其数学表达式为:|PF1|+|PF2|=2a(2a>|F1F2|)。椭圆是圆锥曲线的一种,即圆锥与平面的截线。椭圆的周长等于特定的正弦曲线在一个周期内的长度。

关键词: 椭圆 怎么

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