问题描述： 已知x^m=3,x^n=2,求x^3m+2n,x^3m-2n的值 1个回答 分类：数学 2014-11-29 问题解答： 我来补答 x^(3m+2n) =(x^m)^3*(x^n)^2 =3^3*2^2 =27x4 =108 x^(3m-2n) =(x^m)^3÷(x^n)^2 =3^3÷2^2 =27/4 X的3m+2n次方 展开全文阅读
