Dik f(x)=x+3tentukan g(x) Jika:f•g(x)=2x+2 g•f(x)=2X+5

fx = x+3
fog = 2x+2
gof = 2x+5

gof = 2x+5
g(f(x)= 2x+ 5
g(x+3)= 2x+5
2(x+3)-1= 2x+5
maka
gx = 2x-1

survei membuktikan
fog = 2x+2
f(g(x) = 2x+2
1 (2x-1)+3= 2x+2
2x+2= 2x+2

maka gx = 2x-1