tolong ya besok di kumpul........

Bab Fungsi
Matematika SMA Kelas XI

f(3x - 2) = 2x + 4
f(3 . x/3 - 2) = 2 . x/3 + 4
f(x + 2 - 2) = 2 (x + 2)/3 + 4
y = (2x + 4 + 12)/3
3y = 2x + 16
2x = 3y - 16
x = 1/2 (3y - 16)
f^-1 (4) = 1/2 . (3 . 4 - 16) = -2

jawabannya C