1. The problem statement, all variables and given/known data Find the Domain of f f(x)=2+7x (2+7x is in square root) 2. Relevant equations 3. The attempt at a solution I'm really not sure. The possible answers i think of seem far to easy. This problem's annoying me because i remember doing it in alg. 2 but it was so long ago i cannot remember exactly how. Anyway here is my attempt f(x)= 2+7X (square root all) now do you just plug in numbers. And if numbers match up you can say whether it is all real numbers or if there is a limit?