问题描述:
已知x(3次方)y(m-1次方)×(乘以)x(m+n次方)y(2n+2次方)=x(九次方)y(九次方)
继续上面的:则4m-3n等于
A.8 B.9 C.10 D.11
继续上面的:则4m-3n等于
A.8 B.9 C.10 D.11
问题解答:
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问题描述:
问题解答:
我来补答