Tolong dong kak, agak lupa soalnya .

6.diketahui:
f(x)=x+1
(fog)(x)=3x²+5
jawab:
(fog)(x)=3x²+5
f(g(x)) = 3x²+5
g(x) +1 =3x²+5
g(x)= 3x²+5-1
g(x)= 3x²+4