## Featured Topic

The sandwich or squeeze method is something you can try when you can’t solve a limit problem with algebra. The basic idea is to find one function that’s always greater than the limit function (at least near the arrow-number) and another function that’s always less than the limit function. Both of your new functions must have the same limit as x approaches the arrow-number...

Read more## Top Weekly

Calculus

### How to Determine Whether a Function Is Continuous

A graph for a function that’s smooth wit...

Calculus

### How to Graph the Inverse of a Function

If you’re asked to graph the inverse of a function,...