Give a direct proof (as in Theorem 2.3) for each of the following. (a) For all integers
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(a) For all integers k and l, if k, l are both even, then k + l is even.
(b) For all integers k and l, if k, l are both even, then kl is even.
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a Proof Since k are both even we may write k 2c and 2d whe...View the full answer
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Related Book For
Discrete and Combinatorial Mathematics An Applied Introduction
ISBN: 978-0201726343
5th edition
Authors: Ralph P. Grimaldi
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