Difference between revisions of "2001 IMO Problems/Problem 4"
(New page: Let n1, n2, ... , nm be integers where m is odd. Let x = (x1, ... , xm) denote a permutation of the integers 1, 2, ... , m. Let f(x) = x1n1 + x2n2 + ... + xmnm. Show that for some distinct...) |
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Revision as of 03:43, 14 October 2008
Let n1, n2, ... , nm be integers where m is odd. Let x = (x1, ... , xm) denote a permutation of the integers 1, 2, ... , m. Let f(x) = x1n1 + x2n2 + ... + xmnm. Show that for some distinct permutations a, b the difference f(a) - f(b) is a multiple of m!.
