# Thread: Question on L'Hôpital's Rule.

1. ## Question on L'Hôpital's Rule.

Can someone explain how to tell the form?
Whether it is...

$\frac{\infty}{\infty}$

$\frac{0}{0}$

And later there are indeterminate forms.

$1^{\infty} or 0^0 or \infty^0$

How do you tell what form it is in?

2. ## Re: Question on L'Hôpital's Rule.

If I understand your question correctly ... simply plug the value for the limit into the numerator and denominator and see what they become. For example given

$\lim _{x \to 0} \frac {\sin x}{x}$ if you substitute 0 for x you get $\frac {\sin 0}{0} = \frac 0 0$