f(x)=√√x+3. Find the inverse of f(x) and its domain.
A. f-¹ (x) = (x - 3)²; x≥0
B. f¹(x) = x² – 3; x ≥ 0
c. f-¹ (x) = (x - 3)²; x≥ 3
OD. f¹(x) = x² - 3; x≥3