I have no idea what you are doing! Are you taking the limit as x goes to something in particular? If so to what?
So, I start off with breaking an x out from both parts of the equations and get:
Here comes the funky part - I try making two variable changes at the same time, refering to a standard maclaurin polynomial and get:
The answer should be 1, so, I assume I'm doing something wrong when I switch variables, any hint on what's going wrong?