diketahui f(x)=2x-7 dan g(x)=3x+2.fungsi (gof)^1(x) adalah

f(x) = 2x -7, dan g(x) = 3x +2
(gof)(x) = g { f (x) }
= g (2x -7)
= 3(2x -7) +2
= 6x -21 +2
= 6x -19
gof(x) = 6x -19
misal gof(x) = y
y = 6x -19
6x = y +19
x = y/6 + 19/6.
(gof)-1 = x/6 + 19/6