Jika f(x) = x² – 2x dan g(x + 1) = 2x

by

maka (g ⚬ f)(x) =

2x² – 4x – 2
Pembahasan:
f(x) = x² – 2x
g(x + 1) = 2x
g(x) = 2(x – 1) = 2x – 2
(g ⚬ f)(x) = g(f(x))
                = 2(x² – 12x) – 2
                = 2x² – 4x – 2
  Jika A = (1 -2 3 0) maka A² – A =