jika f(x) = 1/2x dan g(x) = 2/3 x+1 maka (g 0 f) -1 (x) =

dianggap gini
f(x) = (1/2)x dan g(x) = (2/3)x + 1
gof(x) = g(f(x)) = g(x/2) = (2/3)(x/2) + 1 = (2x/6) + 1
gof(x) = (x + 3)/3
misal y = (x + 3)/3
3y = x + 3
x = 3y - 3
invers ganti y dengan x
gof^-1(x) = 3x - 3