# ACT Math : How to find the domain of a function

## Example Questions

2 Next →

### Example Question #11 : How To Find The Domain Of A Function

What is the domain of the following function?

Explanation:

The two potential concerns for domain in a standard function are negative numbers inside even-powered radicals, and dividing by zero. In this case, the radical we have is odd-powered, so having a negative result underneath the radical is fine. All we need to do, then, is avoid dividing by zero, which means avoiding a result which sums to zero under the radical. In this case, only  will create this situation, so we must avoid it.

Thus, our domain is

### Example Question #12 : How To Find The Domain Of A Function

Find the domain of the following function: