Diketahui f (x) = 2x+3 , g(x) = x+10 tentukan fog (x) dan gof (x)

fog(x)= 2x+3 o x+10
         = 2(x+10)+3
         = 2x+23
 gof(x)= x+10 o 2x+3 
          = (2x+3)+10
          =2x+13

Diketahui :
f (x) = 2x + 3
g (x) = x + 10

Ditanya : fog (x) dan gof (x) ?

Dijawab :
fog (x)
= f (g (x))
= f (x + 10)
= 2 (x + 10) + 3
= 2x + 20 + 3
= 2x + 23

gof (x)
= g (f (x))
= g (2x + 3)
= (2x + 3) + 10
= 2x + 13

Jadi, fog (x) = 2x + 23 dan gof (x) = 2x + 13