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歡迎您訪問數學考題練習:下列各式計算正確的是!

數學考題練習:下列各式計算正確的是

更新時間:2024-01-12 16:33:28作者:貝語網校

下列各式計算正確的是

A.x3•x3=2x3

B.(x23=x5

C.x3+x5=x8

D.(xy)4=x4y4

試題答案

D

試題解析

根據同底數冪的乘法的性質,冪的乘方的性質,積的乘方的性質,合并同類項的法則,對各選項分析判斷后利用排除法求解.

解答:x3•x3=x6,故本選項錯誤;

B、(x23=x6,故本選項錯誤;

C、x3+x5不能合并,故本選項錯誤;

D、(xy)4=x4y4,故本選項正確.

故選D.

點評:本題考查了合并同類項,同底數冪的乘法,冪的乘方,積的乘方,理清指數的變化是解題的關鍵.

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