Jika g(x) = 2x – 5 dan (fog) (x) = 6x – 13 maka f(3)

G(x) = 2x -5
Y = 2x -5
2x = y +5
X = (y +5)/2
g^-1(x) = x +5 / 2

(f○g)(x) = 6x -13
f(x) = (6x -13) (g^-1)
f(x) = (6(x+5 /2) -13)
f(x) = 3x +15 -13
f(x) = 3x +2

Semoga membantu…