# Math Help - l'hopital rule

1. ## l'hopital rule

my question is regarding l'hopital rule.

i understand the rule is applicable only if both limits -
of f(x) and g(x) when were looking for lim of f(x)/g(x)
are identical and go to infinity, -infinity or 0.

my question is what if one limit is infinity, and the other -inifinty...
is there any way to go around that, or that means the limit does not exist?

2. Originally Posted by vonflex1

my question is regarding l'hopital rule.

i understand the rule is applicable only if both limits -
of f(x) and g(x) when were looking for lim of f(x)/g(x)
are identical and go to infinity, -infinity or 0.

my question is what if one limit is infinity, and the other -inifinty...
is there any way to go around that, or that means the limit does not exist?

3. The rule actually says that $\lim_{x\to c}f(x)=\pm \lim_{x\to c}g(x)=\pm \infty$