Let `f: NvecZ`be a function defined as `f(x)=x-1000.`Show that `f`is a – InterviewSolution

1.	Let `f: NvecZ`be a function defined as `f(x)=x-1000.`Show that `f`is an into function.
Answer» Let `f(x)=y=x-1000` `implies x=y+1000=g(y)` (say) Here g(y) is defined for each `y in Z,` but `g(y) notin N " for " y le -1000.` Hence `f` is into.

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