Question

What does (fog)(x) mean?

Answer 1

(fog)(x) means f(g(x)). this means we have to use the two functions f(x) and g(x). In this case, we substitute the function of g(x) to the x- variable of the function of f(x). The two functions can be both polynomials or monomials. In this case, the answer to this problem is f(g(x)).

Answer 2

(fog)(x) = f[g(x)] ...................