Diketahui f(x) = x-1 dan (gof)(x) = -6x+3, tentukan nilai g(4)​

Diketahui:

f(x) = x-1 dan (gof)(x) = x²-6x+3

Ditanya: g(4)​

Jawab:

(gof)(x) = x²-6x+3

g(f(x)) = x²-6x+3

g(x-1)) = x²-6x+3

g(4) = g(5-1)

g(4) = 5² – 6×5 + 3

g(4) = 25 – 30 + 3

g(4) = -2