Respuesta :

harpazo

We need to find f inverse.

f(x) = 2(x - 4)^2

Let y = f(x)

y = 2(x - 4)^2

x = 2(y - 4)^2

x/2 = (y - 4)^2

sqrt{x/2} = sqrt{(y - 4)^2}

sqrt{x/2} = y - 4

sqrt{x/2} + 4 = y

y = sqrt{x/2} + 4

Let y = f^(-1) x

f^(-1) x = sqrt{x/2} + 4