Given the function: f (x) = StartRoot 3 x + 6 EndRoot What is the inverse function of f(x)? f Superscript negative 1 Baseline (x) = StartFraction x squared minus 6 Over 3 EndFraction, x ≥ –2 f Superscript negative 1 Baseline (x) = StartFraction x squared minus 6 Over 3 EndFraction, x ≥ 0 f –1(x) = – 6x2 – 3, x ≥ –2 f –1(x) = – 3x2 – 6, x ≥ 0