Question 278433
If you are looking for f(x) + g(x) (or (f+g)(x) which means the same thing) then you are correct.<br>
For the domain you are looking for the possible values for x. Any number can be squared. So the domain for f(x) is all Real numbers. Only non-negative (zero or positive) numbers have a square root so the domain for g(x) and f(x) + g(x) is {{{x>=0}}}