若m-n=-2分之3,则代数式（n-m)^-3乘（m-n)的值为多少
人气：349 ℃ 时间：2020-07-05 09:43:40
解答
(n－m)^(－3)乘以(m－n)
=－(n－m)^(－3＋1)
=－(3分之2)²
=－9分之4
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