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二次函數頂點坐标公式
二次函數頂點坐标公式
更新时间:2024-10-07 08:20:26

  1、對于二次函數y=ax^2+bx+c,其頂點為 (-b/2a,(4ac-b^2)/4a)。

  2、抛物線y=ax^2+bx+c(a≠0)的圖象:當a>0時,開口向上,當a0,當x≤-b/2a時,y随x的增大而減小;當x≥-b/2a時,y随x的增大而增大.若a

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