General

What math property is this ca/b

I'm not sure what to rewrite this is, but the directions says to..

The title wouldn't let me write it correctly, so this is it.
C^(A/B)

I know that P^(N+M) is rewritten as P^N * P^M but I've never seen it like above...

Any thoughts? Thanks! Also, do you have any recommendations for a tutorial/review of logs (math / log10(x) = 48) online? It can be a video or webpage; whatever.