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Classroom Notes

A generalization of the formula for the triangular number of the sum and product of natural numbers

Pages 979-985 | Received 07 May 2007, Published online: 18 Sep 2008
 

Abstract

This note generalizes the formula for the triangular number of the sum and product of two natural numbers to similar results for the triangular number of the sum and product of r natural numbers. The formula is applied to derive formula for the sum of an odd and an even number of consecutive triangular numbers.

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