Jika Diketahui f (x) =x+4dan g(x) =3x+1 nilai Dari (fog) ¯¹(2)adalah

(fog)(x) = 3x + 1 + 4
(fog)(x) = 3x + 5
y = 3x + 5
3x = y - 5
x = (y-5)/3
(fog)^-1(x) = (x-5)/3
(fog)^-1(2) = (2-5)/3
(fog)^-1(2) = -1