作者查詢 / n19860423
作者 n19860423 在 PTT [ Math ] 看板的留言(推文), 共187則
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2F推: 這邊沒講到n是整數,這樣做會不會有瑕疵?08/16 22:48
3F推: (5n-13)是(8n+45)的因數,(5n-13)也是(5n-1308/16 22:53
4F→: )的因數,所以(5n-13)是[5(8n+45)-8(5n+13)08/16 22:53
5F→: ]的因數。也就是(5n-13)是329的因數,再去分析32908/16 22:53
6F→: 各因數判斷。08/16 22:53
10F推: 樓上b大~對耶~~謝謝您的提醒08/18 00:19
11F→: 所以是否是題目沒有寫完整?08/18 00:19
14F推: 我和其他人也都算50%,一直等答案有沒有更正~"~12/24 12:42
11F推:XD09/25 23:05
3F推:Σ後那一串也有問題吧~?03/24 15:55
4F→:不能直接把n(n+1)(2n+1)/6倒數03/24 15:56
1F推:(1+1/12)+(1/2+1/11)+...+(1/6+1/7)10/21 22:37
3F→:所以q一定是13的倍數,除以13餘數=010/21 22:37
52F推:看完P2再到這看到這篇,果然是你XD08/10 17:45
53F推:所需的時間無法計算...只要依一閒下來開始想自己卡08/10 17:47
54F→:住的題目...我習慣下課後自己重新整理上課筆記08/10 17:48
55F→:邊整理邊想,大概2~3小時...08/10 17:48
56F→:只是我現在還是覺得很難 (自己怎麼pass的都不知道><)08/10 17:49
2F→:)07/07 14:57
1F推:用矩陣07/07 14:15
1F推:設過(1,10)的直線y-10=m(x-1)05/17 22:50
2F→:分別與L1和L2解聯立求A、B 再去算AB^2=1805/17 22:51
3F→:不過計算式太複雜,有點變相是在考驗計算能力XD05/17 22:52