Question

n ∈ Z fn: z--> z fn(x)=nx
for which values of n is fn onto?
For which values of n is fn one-to-one?

Answer 1

hello!

Answer 2

your graph will look something like this:

where those ordered pairs are in the form (x,nx)
and x is an integer and nx is an integer

Answer 3

let's consider n=1
f(x)=x
will you get the whole set of integers as your range?

Answer 4

yes you will!

Answer 5

yes so if n=1 we have onto right?