Jika f(x) = x + 3 dan (g o f)(x) = 2x² + 4x - 3, maka (f o g)(1)= ...
Jawab:
g o f(x) = (g.(x + 3))
2x² + 4x - 3 = 2(x + 3)² - 8(x + 3) + 3
g(x) = 2x² - 8x + 3
f o g(x) = 2x² - 8x + 3 + 3
f o g(x) = 2(1)² - 8(1) + 6 = 0