Question: what is the difference between the composition and the product of two functions?
Answer: What is the difference between the product of two functions f(x)⋅g(x) and the composition of them f(g(x))? ... However a composition requires that the inner function be substituted for “x” in the outer function. In such a case of f(g(x)), then g(x) must be plugged into every “x” in the function f(x).