Question

f(x)=[[x]] what does the double bracket mean?

Answer 1

It means any x will be the integer below it, for example f(1.999)=1

Answer 2

f(-3.2222)=-4

Answer 3

but they want me to get the derivative of it and graph the derivative..

Answer 4

and they get a really weird graph, where it is unknown on every whole number

Answer 5

The graph of f(x)=[[x]] looks like