Correcting: (2n!)!/(n!*n!)types,every type has n!*n! permutation

回答: Welcome back,jinjing2010-11-11 16:59:18

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(2n!)!/(n!*n!)shoud be (2n)!/(n!*n!) -jinjing- 給 jinjing 發送悄悄話 (0 bytes) () 11/12/2010 postreply 08:47:07

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