# What is the domain and range of #3sqrt( x^2 - 9)#?

##### 1 Answer

Feb 9, 2016

Domain:

Range:

#### Explanation:

x can take on values -3 or less up to

also x can take on values 3 or higher up to

that is why Domain :

The lowest possible value is 0 up to

That is if we let

when

So the Range: