If the final composition of two functions ends up as __1__
x-3

What would be the domain restriction? Describe how you found that answer.

That is, only real numbers can be used in the domain, and only real numbers can be in the range. There are two main reasons why domains are restricted. You can't divide by 0 . You can't take the square (or other even) root of a negative number, as the result will not be a real number.