Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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(4) (a) Prove that the sum of an even natural number and an odd nat-
ural number is always odd.
(b)
Prove that if x is a natural number and y is an even natural
number, then xy is even.
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Transcribed Image Text:(4) (a) Prove that the sum of an even natural number and an odd nat- ural number is always odd. (b) Prove that if x is a natural number and y is an even natural number, then xy is even.
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