is the inverse function of x+ floor(x)

Question

equal to x - floor (x/2)

i got this after plotting points but i'm not sure. thank you

Answer 1

Nope. f^-1 is the graph of f reflected through the line y=x.

Visit http://rechneronline.de/function-graphs/

to plot your two functions.
Note that floor(x) is called R0(x) there. There is an instructions button for help with function names.

If you revise your definition a bit and plot it, you should come up with the right one.