已知2的m次方=3,4的n次方=5,求2的2m-6n+1次方的值
问题描述:
已知2的m次方=3,4的n次方=5,求2的2m-6n+1次方的值
答
2^(2m-6n+1)
=2*(2^m)^2/2^6n
=2*3^2/(4^n)^3
=2*9/5^3
=18/125