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Far East Journal of Mathematical Education

Far East Journal of Mathematical Education
Volume 20, Issue 3, Pages 79 - 82 (October 2020)
http://dx.doi.org/10.17654/ME020030079

PROOF WITHOUT WORDS: RELATIONSHIP BETWEEN COMBINATION AND SUM OF CUBIC NUMBERS

Yukio Kobayashi

Abstract:

An extended version of a visual clue of the theorem for a positive integer n is presented. The extended diagram helps students understand the relationship between combination and the sum of cubic numbers using an example of two types of league games.