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  3. let f : z × z → z be defined by f(n, m)

Let f : Z × Z → Z be defined by f(n, m) = n...

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Advance Math

Let f : Z × Z → Z be defined by f(n, m) = n − m

a. Is this function one to one? Prove your result.

b. Is this function onto Z? Prove your result

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