Show that an integer N is divisible by 9 if and only if the sum of its digits is divisible by 9
Show that an integer N is divisible by 9 if and only if the sum of its digits is divisible by 9
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.2: Arithmetic Sequences
Problem 56E
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Show that an integer N is divisible by 9 if and only if the sum of its digits is divisible by 9
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