Dik: fungsi g(x) =x+1 dan f(x) = x² + x – 1.Komposisi fungsi (f o g)(x) =……

Fog (x) = (x+1)^2 + (x+1) – 1
fog (x) = (x^2 + 2x + 1) + (x+1) – 1
fog (x) = x^2 + 3x + 1

F(fog)(x)=f(g(x))
=(x+1)^2+(x+1)-1
=x^2+2x+1+x+1-1
=X^2+3x+1