Question

Diket, fungsi f dan g yaitu f (x) =3x+2 dan g (x) = 2x-1. Tentukan :
A. (f-g) (x)
B. (fog) (x)

Mohon bantuannya ya.. Terimakasih

Answer 1

A. f(x)=3x+2 g(x)=2x-1

(f-g)(x) = f(g(x))
= f(2x-1)
= 3(2x-1)2
= x+1
jadi (f-g)(x)=x+1

B. f(x)=3x+2 g(x)=2x-1

(f•g)(x)=f(g(x))
=f(2x-1)
=3(2x-1)2
=6x-1+2
=6x+1
jadi (f•g)(x)=6x+1