Determine the inverse of f(x)=x−3f(x) = \sqrt{x-3}f(x)=x−3 for x≥3x \geq 3x≥3.
x^2 + 3, x \geq 0
x^2 - 3, x \geq 0
x^2 + 3, x \geq 3
\sqrt{x} + 3