n=2m+3
2m-n=-3
(2m-n)³=(-3)³=-27
若2的5次方xⁿ与6x的2m+3次方是同类项,则(2m+n)³=
若2的5次方xⁿ与6x的2m+3次方是同类项,则(2m+n)³=
数学人气:127 ℃时间:2019-10-23 11:00:55
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