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歡迎您訪問數學考題練習:下列各組式子中是同類項的是!

數學考題練習:下列各組式子中是同類項的是

更新時間:2024-01-12 16:45:22作者:貝語網校

下列各組式子中是同類項的是

A.4x與4y

B.4xy2與4xy

C.4xy2與4x2y

D.4xy2與4y2x

試題答案

D

試題解析

根據同類項的定義中相同字母的指數也相同,分別對選項進行判斷即可.

解答:A、4x與4y字母不同,不是同類項;

B、4xy2與4xy字母相同但字母的指數不同,不是同類項;

C、4xy2與4x2y字母相同但字母的指數不同,不是同類項;

D、4xy2與4y2x字母相同,字母的指數相同,是同類項.故選D.

點評:本題考查同類項的定義,所含字母相同且相同字母的指數也相同的項是同類項.注意同類項定義中的兩個“相同”:(1)所含字母相同;(2)相同字母的指數相同.

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