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Re:我贴过来In Reply To:我贴过来 Posted by:frkstyc at 2005-07-22 20:41:44 有个地方不明白。。。推n个6里面: 而 5*5 + 4*2 + 3*1 + 2*2 + 1*5 = 25 + 8 + 3 + 4 + 5 = 45 < 48 这里5+1就已经可以合出一个6,这样就满足n=n-2的条件了。这里应该是要从1-5的组合中找出不能合出6的最大数,而5+1=6,5×2+2=6×2,5×3+3=6×3,5×4+4=6×4,就是说5×5之后任意加1-4中的一个都能合出6,即满足n=n-2,那么推论中的n其实应该换成5,即5×5 < 6×5,根据抽屉原理,再加就是n=n-2, 结论是对于n个6,n>=5的基数,可以改为3,对于偶数可以改为4。其余推论略同。 Followed by: Post your reply here: |
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