If f of x is equal to square root of x minus 3 end root , which inequality can be used to find the domain of f of x ?

For a real-valued square root, the expression inside the radical must be greater than or equal to 0. Here the radicand is x − 3, so the inequality is x − 3 ≥ 0, which is choice C.

AI-written and checked against the verified answer.