Question

Which function below is the inverse of f(x) = x^2 - 16

Answer 1

`f(x) = x^(2) - 16`

`y + 16 = x^(2) - 16 + 16`

`y + 16 = x^(2)`

`√(y + 16) = \sqrt{x^(2)}`

`\±√(y + 16) = x`

`\±√(x + 16) = y`

`\±√(x + 16) = f^(-1)(x)`