__Composite Function :- __

^{A composite function of two functions combines the given two functions in the given order. i.e., for any given two functions f(x) and g(x), there can be 4 composite functions:}

- f(g(x)) which is substituting g(x) into f(x)
- g(f(x)) which is substituting f(x) into g(x)
- f(f(x)) which is substituting f(x) into itself
- g(g(x)) which is substituting g(x) into itself