若x^n=2,x^m=3则x^3n+2m=? 过程?
问题描述：
若x^n=2,x^m=3则x^3n+2m=? 过程?
答
x^（3n）=2^3=8,x^(2m)=3^2=9->x^(3n+2m)=8*9=72
答
x^3n+2m=(x^n)^3*(x^m)^2=2^3*3^2=8*9=72