Composite function help?

Question

In the composite function m(d(x))..

function d is called the —?— function.

function m is called the —?— function.

what is another symbol for..m(d(x))?

thanks!!

Answer 1

d is the inner function.

m is the outer function.

m(d(x)) can also be written as (mod)(x), where the "o" should be a little smaller.