And r a bq giving that c q 2 and r 1241 517 2 207 dq

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andr=abq, giving that(c)q=2 andr= 1241(517)(2) = 207;(d)q= 3 andr=1241(517)(3) = 310.
Question 4. (1 pt)(Exercise 6.10.)(a) Prove thatd|aimplies thatd| −a.(b) Prove thatd|aiffd| −a.(c) Prove thatd|aiffd| |a|.Solution.
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Question 5. (2 pt)Exercise 6.4.Show that for 3|(n3n) for all integersn. (Consider the three cases:n= 3k,n= 3k+ 1,n= 3k+ 2.)

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