Invers F(x)=1/3-x dan g(x)= x-4 tentukan (foq)-1(x) dan (gof)-1(x)

Ingat:
f(×) = ax+b/c×+d
f^-1(x)= -dx+b/cx-a

Jawab:
>(fog)(x) = 1 / 3-(x-4)
= 1/-3x+12
(fog)^-1(x)=-12x+1 / -3x

>(gof)(x)= (1 / 3-x) -4
= -4 / 3-x
= -4 / -x+3
(gof)^-1(x) = -3x-4 / -x