We're doing limits, which is pretty much the first thing you do in any cal class, but I can't rename this one to make it work. I think I'm going to have to find the derivative of the function, but we haven't learned that yet.

Lim(x--> 0) $\displaystyle ((1/(2+x)) - (1/2))/x$

P.S. Sorry if the I don't know how to use the math format for this stuff. I'm new to this forum, and I don't know how to use the different tags