(3m^2n^3)/mn)^2
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(3m^2n^3)/mn)^2(3m^2n^3)/mn)^2(3m^2n^3)/mn)^2(3m^2n^3)/(mn^2)=3m^(2-1)n^(3-2)=3mn原式=3(m^2/m)(n^3/n^2
(3m^2n^3)/mn)^2
(3m^2n^3)/mn)^2
(3m^2n^3)/mn)^2
(3m^2n^3)/(mn^2) =3m^(2-1)n^(3-2) =3mn 原式=3(m^2/m)(n^3/n^2) =3mn
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