Question: Let n be an integer. Prove that n is odd if and only if 7n + 8 is odd.

Let n be an integer. Prove that n is odd if and only if 7n + 8 is odd.

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Proof If n is odd then n 2k 1 for some particular integer k Then 7n 8 72k 1 8 14k 7 8 14k 15 ... View full answer

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