3 marks Give an example of a function a) f Z Z that is 1 1 and not onto Z b) f c) f Z N that is 1 1 and not onto N ZZ that is onto Z but not 1 1 2 marks Determine whether each of these functions from Z to Z is surjective (onto) a) f(n) 4n 1 b) f(n) 3n2 1

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3 marks  Give an example of a function  a) f Z  Z that is 1 1 and not onto Z b) f  c) f Z N that is 1 1 and not onto N ZZ that is onto Z but not 1 1  2 marks  Determine whether each of these functions from Z to Z is surjective (onto)  a) f(n)  4n 1 b) f(n) 3n2 1

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Question

[3 marks] Give an example of a function: a) f:Z->Z that is 1-1 and not onto Z b) f: c) f:Z-N that is 1-1 and

[3 marks] Give an example of a function: a) f:Z->Z that is 1-1 and not onto Z b) f: c) f:Z-N that is 1-1 and not onto N ZZ that is onto Z but not 1-1 [2 marks] Determine whether each of these functions from Z to Z is surjective (onto)? a) f(n) -4n+1 b) f(n)-3n2-1

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