若a^m=4,a^n=6则a^m-n的值为?A.2/3 B.2 C.10 D.24

问题描述:

若a^m=4,a^n=6则a^m-n的值为?A.2/3 B.2 C.10 D.24

a^m-n
=a^m/a^n
=4/6
=2/3
选A