# How do you find the domain and range of #f(x)= 2x^2-1#?

##### 1 Answer

Aug 14, 2015

Domain:

Range:

#### Explanation:

Your function is defined for any value of

In order to determine the function's range, focus on the fact that you're dealing with the *square* of a value *any* number will be **positive**.

This means that the *minimum* value this function can take will occur at

#f(0) = 2 * 0^2 - 1 = -1#

For any value of

graph{2x^2-1 [-10, 10, -5, 5]}