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Unformatted text preview: Let 2n + 1 = z 2 . Note that z must be odd. Simple algebra gives z 2 /2 + 1/2 = n + 1 . The following &quot;Solution Without Words&quot; was Ray Kremers little gem. [IMAGE]...
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 Spring '10
 AlbertoDelgado
 Algebra, Combinatorics, Following, Ray Kremer

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