Jika f(x) = x² – 2x dan g(x + 1) = 2x 17/01/2023 by rizalhadizan 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 Perbandingan kecepatan sepeda motor dan kereta api adalah 3 : 5.