Thanks!!
-qbkr21
For problems like these, you are usually given functions where you can tell what the inverse of a particular number is. it is almost obvious to see that just by looking at and mentally plugging in values and working backwards. however, if that does not suffice you, note that is the solution to the following equation:
the last equation has no real solutions, so we take
thus,
EDIT: Oh, and, yes, it looks good, qbkr21