Question

已知a的m次幂=2,a的n次幂=3,求a的（2m+3n -1）次幂的值

Answer 1

∵a^m=2 ,a^n=3

∴a^(2m+3n -1)

=a^2m*a^3n/a

=4*27/a

=108/a

若是求a的（2m+3n ）次幂的值：

a^(2m+3n )

=a^2m*a^3n

=4*27

=108