f(x) = 2x – 7, g(x) = x + 5, maka (gof)(x) =

f(x) = 2x – 7, g(x) = x + 5, maka (gof)(x) = ….

Pembahasan:

(gof)(x) = g(f(x))

              = g(2x – 7)

              = (2x – 7) + 5

(gof)(x) = 2x – 2