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[parent] Viewing Message
``better proof n choose r (combinations)'' by polarbear on 2009-07-22 04:23:31
See here for a better proof, I don't like induction proofs in general
http://answers.yahoo.com/question/index?qid=20090721204009AA01cNo&r=w#TMF_WmTtUzXSve1xiTd0yTbppPVBtGYQF_aEEkCkr2tF6_vcSmeQ
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