PROOF WITHOUT WORDS: THE SUM OF THE PRODUCT OF TWO CONSECUTIVE INTEGERS. Far East Journal of Mathematical Education, [S. l.], v. 24, p. 17–20, 2023. DOI: 10.17654/0973563123007. Disponível em: https://pphmjopenaccess.com/fejme/article/view/144. Acesso em: 5 jan. 2026.