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Proof without Words: 1? + 2? + 3? + 4? + ... + n? = {n(n + 1)}2/4

by Antonella Cupillari

This article originally appeared in:
Mathematics Magazine
October, 1989

Subject classification(s): Number Patterns | Numbers and Computation
Applicable Course(s): 4.1 Introduction to Proofs | 3.7 Discrete Math

The author presents a visual proof of the well-known formula for the sum of the first n cubes.

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