试题与答案

下列运算正确的是( ) A.a2•a3=a6 B.(-y2)3=y6 C.(m2

题型:选择题

题目:

下列运算正确的是(  )

A.a2•a3=a6

B.(-y23=y6

C.(m2n)3=m5n3

D.-2x2+5x2=3x2

答案:

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