题目内容
下列计算正确是
A.(ab3)2=ab5
B.(mn+1)2=mn+2
C.[(-2y)2]3=-64y6
D.(x3y4)n=x3n·y4n
A.x3+2x3=3x6
B.(x3)3=x6
C.x3·x3=x9
D.x÷x3=x-2