f(x)=2x+1 dan g(x)=x2.Tentukan (fog)(x) dan (gof)(x)?

f(x) = 2x + 1 dan g(x) = x^2.
f o g (x) = f { g(x) }
= f (x^2)
= 2(x^2 ) + 1
= 2x^2 + 1
g o f (x) = g { f (x) }
= g (2x +1)
= (2x + 1)^2
= 4x^2 + 4x + 1