For every positive integer a, find a composite number n such that n|a" – a.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.3: Divisibility
Problem 26E: 26. Let be an integer. Prove that . (Hint: Consider two cases.)
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