Diket: f(x) = 3x-4 (g o f) (x) = 6x-1 Tentukan : 9-¹(3)

(gof)(x) = g(f(x))
6x-1 = g(3x-4)
-> y=3x-4
-> x=(y+4)/3

6((y+4)/3)-1 =g-¹(y)

6((3+4)/3)-1 =g-¹(3)

42/3 - 1 =g-¹(3)

14-1 = g-¹(3)

13 =g-¹(3)