diketahui f(x) = 2x - 3 dan (g• f) (x) = 2x - 1, tentukan g(x) = ??

Misalkan g(x) = a
g(x) = 2x - 3 = a
x = (a+3)/2

(g•f) (x) = g (f(x))
2x-1 = g (2x-3)
(2(a+3)/2) -1 = g (a)
a + 3 - 1 = g(a)
g(a) = a + 2
g(x) = x + 2

Semoga membantu,