Question: exercise 1.1 questions: a,b,c,d exercise 1.2 please explain and write neatly thank you Exercise 1.1 (a) Use induction to show that n2 -n is always

exercise 1.1 questions: a,b,c,d exercise 1.2 please explain and write neatly

exercise 1.1

questions: a,b,c,d

exercise 1.2

please explain and write neatly thank you

Exercise 1.1 (a) Use induction to show that n2 -n is always even. Answer (b) Give a direct proof in one or two sentences that n2-n is always even. Answer: (c) Show that n - n is always divisible by three. Answer: (d) Is ns - n always divisible by 5? Explain your answer. Answer: Exercise 1.2 Let F(n) be the n-th Fibonacci number Fib(n). Prove that F(n)

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