http://img192.imageshack.us/img192/5...hproblem13.png

As the picture implies

I am currently taking a calculus course at a university, and of course we are starting off with some review after forgetting everything over the summer

The section that this question is under is titled "Inverses, logarithms, and exponential functions" but honestly I have no idea what to do

No one even has to solve this, just getting me on the right mental track would be appreciated