dik: f(x) : 2x-1 , (g•f)(x) : 4x² - 2x tentukan : g(x)!!?

Kelas 10 Matematika
Bab Fungsi Komposisi

(gof) = 4x² - 2x
g (2x - 1) = 4x² - 2x.
g (2 . x/2 - 1) = 4 . (x/2)² - 2 . x/2
g(x - 1) = 4 . x²/4 - x
g(x + 1 - 1) = (x + 1)² - (x + 1)
g (x) = x² + 2x + 1 - x - 1
g (x) = x² + x