Prove that the set 3Z + 2 = {3n + 2: n E Z} is denumerable. Hint: It may be easier to build a bijection of 3Z+2 with Z, and compose it with a bijection of Z with N.

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A: As per our guidelines, we are supposed to solve only first question. Kindly repost other question as…

Q: b) If d = 1, prove that (1 if a is odd gcd(a, 2b) %3D if a is even

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