Question: Consider the functionf: ZZ given by f(n) = (a) Is f injective? Prove your answer. (b) Is f surjective? Prove your answer. (n+1 if

Consider the functionf: ZZ given by f(n) = (a) Is f injective?

Consider the functionf: ZZ given by f(n) = (a) Is f injective? Prove your answer. (b) Is f surjective? Prove your answer. (n+1 if n is even n-3 if n is odd. -3

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