亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數學考題練習:下列各式中,正確的是!

數學考題練習:下列各式中,正確的是

更新時間:2024-01-12 16:26:59作者:貝語網校

下列各式中,正確的是

A.a3•a5=a8

B.a3+a5=a8

C.(a2b)2=a4b

D.(a-b)2=a2-b2

試題答案

A

試題解析

根據同底數冪的乘法A等于a8;B不是同類項不能合并;根據積的乘方C等于a4b2;根據完全平方公式D應等于a2-2ab+b2

解答:A、a3•a5=a3+5=a8,正確;

B、a3與a5不是同類項,不能合并,故本選項錯誤;

C、應為(a2b)2=a4b2,故本選項錯誤;

D、應為(a-b)2=a2-2ab+b2,故本選項錯誤.

故選A.

點評:本題涉及到完全平方公式、同底數冪的乘法、合并同類項、積的乘方等知識點,考查學生對以上內容的熟練掌握程度.

為您推薦

加載中...
主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |