algebra
posted by Bill on .
Hey , can anyone help me out please? i'm really confused with this problem.
Prove that:
a^(m/n)= n(radical sign) a^m
Any help is appreciated, thank you.

The nth root of a^m is BY DEFINITION a^(m/n)
If you want a more convincing "proof", raise both sides of the equation to the nth power.
The left side is a^(m/n) multiplied by itgself n times, yielding a^m.
The right side is also a^m, because you started out with the nth root of that quantity. 
ok, thanx mate