已知8的M次方=12,4的N次方=6,则2的6m-2n+1=?
问题描述:
已知8的M次方=12,4的N次方=6,则2的6m-2n+1=?
答
8^m=12
(2^3)^m=2^3m=12
4^n=6
(2^2)^n=2^2n=6
2^(6m-2n+1)
=2^6m/2^2n*2
=(2^3m)^2/2^2n*2
=12^12/6*2
=48