Question

Which function is the inverse of function of f if the domain of f is x > 0?
f(x) = x^2 + 6

Answer 1

f⁻¹(x) = ± √x-6

Explanation:

f(x) = x² + 6

y = x² + 6

x = y² + 6 ... replace x and y

solve y: y² = x - 6

y (f⁻¹(x)) = ± √x-6