Andaikan \lim_{x \rightarrow a} |f(x)|= \lim_{x \rightarrow a}|g(x)|= \infty$, dan jika \lim_{x \rightarrow a}\frac{f'(x)}{g'(x)} ada,[latexpage]$latex \lim_{x \rightarrow a}\frac{f(x)}{g(x)}=\lim_{x \rightarrow a}\frac{f'(x)}{g'(x)}$