Question

已知(-2a的n次方)的3次方与(2m-4)a的9次方互为相反数,求3/(m-3n)的m次方的值.

Answer 1

（-2a^n)^3+(2m-4)a^9=0

-8a^3n+(2m-4)a^9=0

2m-4=-8,m=-2

3n=9,n=3

3/(m-3n)^m

=3/(-2-9)^-2

=3*121

=363