已知5m=3 ,25的n次方=11,求5的3m-2n次方的值
问题描述：
已知5m=3 ,25的n次方=11,求5的3m-2n次方的值
答
5^(3m-2n)
=5^(3m)/5^(2n)
=(5^m)^3/(5^2)^n
=(5^m)^3/25^n
=3^3/12
=27/11