diketahui f( x) =4x+2 dan g(x) =x-2 tentukan(fog) -1(-1)

(fog)(x) = 4(x-2) + 2
(fog)(x) = 4x - 6
y = 4x - 6
4x = y + 6
x = (y + 6)/4
(fog)^-1(x) = (x + 6)/4
(fog)^-1(-1) = (-1 + 6)/4
(fog)^-1(-1) = 5/4