5. Show that 1.2+2·3+3.4+...+ (n − 1)(n) = (n³ − n)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter2: Equations And Inequalities
Section2.1: Equations
Problem 52E
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5. Show that 1.2+2·3+3.4+...+ (n − 1)(n) = (n³ − n)
Transcribed Image Text:5. Show that 1.2+2·3+3.4+...+ (n − 1)(n) = (n³ − n)
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