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3189| 6
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证明组合数都是整数 |
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爪机专用
Post time 2015-2-10 03:27
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其妙
Post time 2015-2-10 21:32
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Author|
hjfmhh
Post time 2015-2-10 21:43
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test
Post time 2015-2-10 22:56
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isee
Post time 2015-2-12 10:19
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2025-3-6 02:27 GMT+8
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利用杨辉三角，由上面是整数自然推出下面的都是正数[得意]
