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歡迎您訪問數學考題練習:已知二次函數y=x2+6x+3的頂點坐標在!

數學考題練習:已知二次函數y=x2+6x+3的頂點坐標在

更新時間:2024-01-12 16:26:18作者:貝語網校

已知二次函數y=x2+6x+3的頂點坐標在

A.第一象限

B.第二象限

C.第三象限

D.第四象限

試題答案

C

試題解析

利用二次函數的頂點公式,計算頂點坐標,再判斷頂點位置.

解答:根據頂點坐標公式,頂點橫坐標x==-3,縱坐標y==-6,頂點坐標為(-3,-6).

故選C.

點評:主要考查了求拋物線的對稱軸和頂點坐標的方法.

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