tag:blogger.com,1999:blog-3550204829234352390.post8081608566379731674..comments2024-03-27T09:13:48.546+08:00Comments on 研發養成所 ( Bridan's Blog - 4rdp, For R&D Person ): 訓練數學感 77 ─ 平方數和Bridanhttp://www.blogger.com/profile/17055047757114667099noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-3550204829234352390.post-13125576153638106342015-10-30T22:54:17.800+08:002015-10-30T22:54:17.800+08:00我自己想到的是方法一我自己想到的是方法一Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-29174266026919968292015-10-30T22:35:32.581+08:002015-10-30T22:35:32.581+08:00這裡附上三種推導方法的連結,
http://www.mathland.idv.tw/life/blo...這裡附上三種推導方法的連結,<br />http://www.mathland.idv.tw/life/blocks.htm<br />n^2-1 = (n+1)(n-1)<br /><br />http://www.shs.edu.tw/works/essay/2005/10/2005103119415097.pdf<br />(n+1)^3 - n^3 = 3n^2 + 3n + 1<br /><br />https://drive.google.com/open?id=0B_TFWEwZaQ8_UUVsaDJwb1UzNTQ<br />這是由網友行天下提供,以積分面積推導<br /><br />https://www.facebook.com/groups/204862582895831/permalink/936610029721079/<br />數學愛好者 FB 討論串<br /><br />這一題說明解法不只一種,應該還有其它,如果你知道歡迎提供連結,方便後人研究,謝謝。Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-59001672046558204512015-10-29T21:42:08.505+08:002015-10-29T21:42:08.505+08:00加分題,這公式不適用於負數,有沒有另外的公式解?加分題,這公式不適用於負數,有沒有另外的公式解?Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-85483966349695448022015-10-29T21:38:50.450+08:002015-10-29T21:38:50.450+08:00正解正解Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-28193655831321946092015-10-29T16:14:13.485+08:002015-10-29T16:14:13.485+08:00338350338350Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-82420600226872041602015-10-29T12:56:11.589+08:002015-10-29T12:56:11.589+08:00公式對,缺推導過程公式對,缺推導過程Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-25354147429421979742015-10-29T12:54:51.695+08:002015-10-29T12:54:51.695+08:00數值不正確數值不正確Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-77347804315676518872015-10-29T01:37:48.552+08:002015-10-29T01:37:48.552+08:00n(n+1)(2n+1)/6n(n+1)(2n+1)/6Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-67316981909199695732015-10-29T00:05:56.384+08:002015-10-29T00:05:56.384+08:00171700171700Anonymousnoreply@blogger.com