# Mathematical Composite Functions

## Functions in math

What is a Function

A function relates an input to an output.

It is like a machine that has an input and an output.

And the output is related somehow to the input.

f(x)
"f(x) = ... " is the classic way of writing a function.
And there are other ways, as you will see!

We will see many ways to think about functions, but there are always three main parts:

- The input
- The relationship
- The output

## Domains, Codomains, and Ranges

Domain, Range and Codomain

## Function composition in math

Composition of Functions

### Links to this note

Have anything to add? You can reach out to me by email or You can find more of my stuff on my links page.