Dik fungsi g(x) = x-1 dan f(x) = x(akar2) + x-1 . Komposisi fungsi (f•g)(-1) = ….

(f o g)(x) = f(g (x))
= f(x – 1)
= (x – 1)√2 + (x – 1) – 1
= √2 x – √2 + x – 1 – 1
= x + √2 x – 2 – √2
(f o g)(-1) = -1 + √2 (-1) – 2 – √2 = -3 – 2√2