[中學] 證明存在某個數或某些數可以被整除?
原題是這樣的
設x1,x2,.....,x20為整數,證明存在某個數或某些數可以被整除20整除。
x後面的數是下標
懇請好心人解答
謝謝~
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04/01 22:42, , 1F
04/01 22:42, 1F
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04/01 22:42, , 2F
04/01 22:42, 2F
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04/01 22:49, , 3F
04/01 22:49, 3F
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04/01 22:51, , 4F
04/01 22:51, 4F
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04/01 22:57, , 5F
04/01 22:57, 5F
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04/01 22:58, , 6F
04/01 22:58, 6F
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04/01 22:58, , 7F
04/01 22:58, 7F
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04/01 23:00, , 8F
04/01 23:00, 8F
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04/01 23:53, , 9F
04/01 23:53, 9F
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04/02 02:00, , 10F
04/02 02:00, 10F
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04/02 03:04, , 11F
04/02 03:04, 11F
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08/13 17:32, , 12F
08/13 17:32, 12F
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09/17 15:25, , 13F
09/17 15:25, 13F
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11/10 11:35, , 14F
11/10 11:35, 14F
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01/02 15:20,
7年前
, 15F
01/02 15:20, 15F
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07/07 10:48,
6年前
, 16F
07/07 10:48, 16F