tentukan rumusan fog f(x)=√4-x

f(x) = √(4 - x)
g(x) = x

(fog)(x)
= √(4 - x)

Domain f (Df)
Agar fungsi f(x) terdefinisi pd bilangan rea :
4 - x ≥ 0
x ≤ 4

Df = {x | x ≤ 4 , x e R}