jika diketahui f(x) = x - 3 dan g(x) = 2x + 4, maka (gof)-1(2) adalah...

Kelas 10 Matematika
Bab Fungsi Komposisi

(gof) (x) = g(x -3)
(gof) (x) = 2 (x - 3) + 4
y = 2x - 2
y + 2 = 2x
x = (y + 2)/2
(gof)⁻¹ (x) = (x + 2)/2
(gof)⁻¹ (2) = (2 + 2)/2
(gof)⁻¹ (2) = 2