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歡迎您訪問數學考題練習:已知二次函數y=mx2+x+m(m-2)的圖象!

數學考題練習:已知二次函數y=mx2+x+m(m-2)的圖象

更新時間:2024-01-12 16:28:29作者:貝語網校

已知二次函數y=mx2+x+m(m-2)的圖象經過原點,則m的值為

A.0或2

B.0

C.2

D.無法確定

試題答案

C

試題解析

本題中已知了二次函數經過原點(0,0),因此二次函數與y軸交點的縱坐標為0,即m(m-2)=0,由此可求出m的值,要注意二次項系數m不能為0.

解答:根據題意得:m(m-2)=0,

∴m=0或m=2,

∵二次函數的二次項系數不為零,所以m=2.

故選C.

點評:此題考查了點與函數的關系,解題時注意分析,理解題意.

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