Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN: 9781133382119
Author: Swokowski
Publisher: Cengage
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Transcribed Image Text:(b) Prove that for every positive integer n that
1 × 22+2 × 3² + 3 × 4² +
...
·+n(n + 1)²
=
n(n + 1)(n + 2)(3n+ 5)
12
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