AFAIK, L'Hopital's rule can be applied here. That is: if $\displaystyle \lim_{x \to c}\frac{f(x)}{g(x)}=\left ( \frac{0}{0} \right )$ then $\displaystyle \lim_{x \to c}\frac{f(x)}{g(x)}=\lim_{x \to c}\frac{f'(x)}{g'(x)}$
Last edited by mr fantastic; Feb 20th 2009 at 01:01 PM.
Reason: Undeleted this reply (and an excellent reply it is too) since the OP probably does not know l'Hopital's Rule.