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Title: Proof without words: alternating row sums in Pascal’s triangle
Authors: Plaza, Ángel 
UNESCO Clasification: 120504 Teoría elemental de los números
Issue Date: 2016
Journal: Mathematics Magazine 
Abstract: Based on the Pascal’s identity, we visually demonstrate that the alternating sum of consecutive binomial coefficients in a row of Pascal’s triangle is determined by two binomial coefficients from the previous row.
ISSN: 0025-570X
DOI: 10.4169/math.mag.89.4.281
Source: Mathematics Magazine [ISSN 0025-570X], v. 89 (4), p. 281 (Octubre 2016)
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