# Section 1.4 - One Sided Limits

In the last lecture, we saw some situations that were a little awkward. $\lim\limits_{x\to 0} \sqrt{x}$, for example, doesn't exist because the function is undefined to the left of 0. This is a little awkward since the function is perfectly "well behaved" on the right side. We can resolve this with what are called "one sided limits".

# Videos

### Lectures

Sometimes it's convenient just to look at what a function is doing on one side of a number, rather than both sides. This will give us a way to talk about functions that aren't defined everywhere and to find the limits of more functions. (lecture slides)