题目内容
若3m=5,3n=4,则32m-3n的值为
[ ]
==÷=÷=.选A.
若3m=5,3n=4,则32m-n等于
6
21
20
若3m=5,3n=7,则3m+n=________,32m+n=________.
A.
B.6
C.21
D.20