jika f(x) = 2x + 3 dan g(x) =x^2 + 1, maka( f o g) (2)

(fog) (2) = f (g(2))
= f ((2)^2 + 1)
= f (4 + 1)
= f (5)
= 2(5) + 3
= 10 + 3
= 13

maaf kalau salah :)
koreksi lagi ya..

F o g (2) = 2(x^2+1)+3
2(2^2+1)+3
2(5)+3
=10+3
=13