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2004 AIME I Problems/Problem 7

Revision as of 17:03, 12 July 2006 by MCrawford (talk | contribs)

Problem

Let $C$ be the coefficient of $x^2$ in the expansion of the product $(1 - x)(1 + 2x)(1 - 3x)\cdots(1 + 14x)(1 - 15x).$ Find $|C|.$

Solution

See also

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