16. Given an odd integer a, establish that a² + (a + 2)²+(a + 4)² + 1 is divisible by 12.

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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16. Given an odd integer a, establish that
a² + (a + 2)²+(a + 4)² + 1
is divisible by 12.
Transcribed Image Text:16. Given an odd integer a, establish that a² + (a + 2)²+(a + 4)² + 1 is divisible by 12.
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