Question 950516

{{{f(x)}}} means "function of{{{ x}}}" and it is the classic way of writing a function
The most common name is "{{{f}}}", but we can have other names like "{{{g}}}" or “{{{h}}}”, or even "{{{marmalade}}}" if we want.
A function relates an input to an output.

Let say we have a function "{{{f}}} of {{{x}}} equals {{{x }}}squared" what goes into the function is put inside parentheses () after the name of the function:

 {{{f(x) }}}shows us the function is called "{{{f}}}", and "{{{x}}}" goes in (or {{{x}}} is an  input)

And we usually see what a function does with the input:

{{{f(x) = x^2}}} shows us that function "{{{f}}}" takes "{{{x}}}" and squares it.

Example with {{{f(x) = x^2}}}:

    an input of {{{4}}}->{{{x=4}}} becomes an output of {{{16}}}

In fact we can write {{{f(4) = 16}}}.