How to find the limit of a function?

First, always try direct substitution. Just plug the value into the function. If you get a real number, that’s your limit. If you get an indeterminate form, like 0/0, you need another strategy. Try simplifying the expression through factoring and canceling terms. You could also try rationalizing the numerator or denominator. For more advanced problems, L'Hôpital's Rule is a very powerful tool. Sometimes, just looking at the graph tells you everything you need to know.