Let n be an integer. Prove that n is even if and only if 31n + 12

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Let n be an integer. Prove that n is even if and only if 31n + 12 is even.

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Discrete and Combinatorial Mathematics An Applied Introduction

ISBN: 978-0201726343

5th edition

Authors: Ralph P. Grimaldi

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Question Posted: Jun 21, 2016 08:09 AM

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Let n be an integer. Prove that n is even if and only if 31n + 12

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Proof If n is even then n 2k for some particular integer k Then 31n 12 312k 12 62k 1...View the full answer

Discrete and Combinatorial Mathematics An Applied Introduction

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