# Math Help - Find the domain of this function

1. ## Find the domain of this function

Given this function, can someone show me step by step how to find the domain:

f(x) = squareroot(x-9)

Step by step would be appreciated.

2. ## Re: Find the domain of this function

Originally Posted by hemi
Given this function, can someone show me step by step how to find the domain:

f(x) = squareroot(x-9)

Step by step would be appreciated.
step 1.

$x-9 \geq 0$

step 2 .

$x \in [9 , +\infty)$