题目内容
与anb2相乘的积为3a2n+1b2n+1的单项式是
A.3a3n+lb2n+3
B.3an+1b2n-1
C.3a2bn
D.3a2n+1b4n+2
与anb2相乘的积为3a2n+262n+2的单项式是
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