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(a) What is the probability that a five-digit integer chosen at random is divisible by 5? (b) Prove that the unit's digit of 9 is
(a) What is the probability that a five-digit integer chosen at random is divisible by 5?
(b) Prove that the unit's digit of 9 is either 1 or 9 for any positive integer n.
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Basic College Mathematics With Early Integers (Subscription)
Authors: Elayn Martin Gay
4th Edition
0135181267, 9780135181263
