Which of the following is a true statement about functions ?

Answer:
D. If [tex]f[/tex] and [tex]g[/tex] are functions then;
[tex](f\bullet g)(x) =f(x)\bullet g(x)[/tex].
Step-by-step explanation:
The first option is not correct because composition of two functions is not commutative.
The second and third choice will also not yield the same result.
Let
[tex]f(x)=x^2[/tex] and [tex]g(x)=2x[/tex].
Then;
[tex](f\bullet g)(x)=2x^3[/tex] and [tex]f(x)\bullet g(x)=2x^3[/tex].
The correct answer is option D.