Question: This problem is from descreete maths, please explain and answer both the questions 12. Determine whether each of these functions from Z to Z is

This problem is from descreete maths, please explain and answer both the questions

12. Determine whether each of these functions from Z to Z is one-to-one. b) f(n) n2 +1 d) f(n) - [n/21 . c) f (n)n3 13. Which functions in Exercise 12 are onto

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