计算27^m÷9^n·3
问题描述:
计算27^m÷9^n·3
答
27^m÷9^n·3
=3^(3m)÷[3^(2n)·3 ]
=3^(3m)÷[3^(2n+1)]
=3^[3m-(2n+1)]
=3^(3n-2n-1)