若3^n=2,3^m=5则3^2m-n
问题描述:
若3^n=2,3^m=5则3^2m-n
答
3^2m-n
=3^m*3^m/3^n
=5*5/2
=25/2
若3^n=2,3^m=5则3^2m-n
3^2m-n
=3^m*3^m/3^n
=5*5/2
=25/2