已知8^m=12,4^n=6,求2^(6m-2n+1)的值
问题描述:
已知8^m=12,4^n=6,求2^(6m-2n+1)的值
答
128
答
2^(6m-2n+1)=2^6m/2^2n*2
=(2^3)^2m/(2^2)^n*2
=(8^m)^2/4^n*2
=12^2/6*2
=48