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歡迎您訪問數(shù)學(xué)考題練習(xí):拋物線y=2x2先向上平移1個單位,再向右平移!

數(shù)學(xué)考題練習(xí):拋物線y=2x2先向上平移1個單位,再向右平移

更新時間:2024-01-12 16:46:09作者:貝語網(wǎng)校

拋物線y=2x2先向上平移1個單位,再向右平移3個單位,所得拋物線的關(guān)系式

A.y=2(x+3)2+1

B.y=2(x-3)2+1

C.y=2(x+3)2-1

D.y=2(x-3)2-1

試題答案

B

試題解析

直接根據(jù)“上加下減,左加右減”的原則進(jìn)行解答即可.

解答:由“上加下減”的原則可知,將拋物線y=2x2向上平移1個單位所得的拋物線的表達(dá)式是y=2x2+1,

由“左加右減”的原則可知,將拋物線y=2x2+1向右平移3個單位所得的拋物線的表達(dá)式是y=2(x-3)2+1.

故選:B.

點評:本題考查了二次函數(shù)的圖象與幾何變換,熟知函數(shù)圖象平移的法則是解答此題的關(guān)鍵.

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