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椭圆的简单几何性质( 1 )

椭圆的简单几何性质( 1 ). 问题 :1. 讨论范围时 , 由标准方程怎样推出 , 的 ? 其推理的根据是什么 ?. 2. 讨论 “ 对称性 ” 时 , 为什么 “ 把 换成 , 方程不变 ” , 图形就关于 轴对称呢 ?. 2. 2. x. y. +. =. 2. P. (. 3. ,. 4. ). 1. ,. P. 、 已知点. 在. 椭圆. 上. 则以. 为顶点的. 2. 2. a. b. PABC. _____. 椭圆的内接矩形. 的面.

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椭圆的简单几何性质( 1 )

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  1. 椭圆的简单几何性质(1)

  2. 问题:1.讨论范围时,由标准方程怎样推出 , 的?其推理的根据是什么? 2.讨论“对称性”时,为什么“把 换成 ,方程不变”,图形就关于 轴对称呢?

  3. 2 2 x y + = 2 P ( 3 , 4 ) 1 , P 、已知点 在 椭圆 上 则以 为顶点的 2 2 a b PABC _____. 椭圆的内接矩形 的面 积 是

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