Diket f(x)=x+3 dan g(x)=2x + 4 maka gof -1 (2)​

Jawaban:

1. (gof)(x)

= g(f(x))

= 2.(x-3) + 4

= 2x – 6 + 4

= 2x-2

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