Path: ccsf.homeunix.org!ccsf.homeunix.org!news1.wakwak.com!nf1.xephion.ne.jp!onion.ish.org!news.daionet.gr.jp!news.yamada.gr.jp!news.media.kyoto-u.ac.jp!not-for-mail From: Newsgroups: fj.sci.math Subject: =?iso-2022-jp?B?UmU6IFF1aXpfMDZpdjIwMDQbJEIhSjJyRXohSxsoQg==?= Date: Wed, 28 Apr 2004 09:16:00 +0900 Organization: Public NNTP Service, Kyoto University, JAPAN Lines: 23 Message-ID: References: <800c7853.0404130611.3be17e79@posting.google.com>> <20040420011947.1d180e6a.yoshiro@mail.wnd.ne.jp> <800c7853.0404200011.1b30e0c8@posting.google.com> <800c7853.0404202010.6c4a68e2@posting.google.com> <800c7853.0404230701.526ec2dd@posting.google.com> <40896DCA.3000001@slis.tsukuba.ac.jp> <800c7853.0404261928.68658456@posting.google.com> <408DF9B1.3000707@slis.tsukuba.ac.jp> NNTP-Posting-Host: sisetu3.honbu.tokushima-u.ac.jp Mime-Version: 1.0 Content-Type: text/plain; charset="iso-2022-jp" Content-Transfer-Encoding: 7bit X-Trace: caraway.media.kyoto-u.ac.jp 1083111772 11762 150.59.108.33 (28 Apr 2004 00:22:52 GMT) X-Complaints-To: news@news.media.kyoto-u.ac.jp NNTP-Posting-Date: Wed, 28 Apr 2004 00:22:52 +0000 (UTC) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Xref: ccsf.homeunix.org fj.sci.math:886 wrote in message news:c6mp5j$7qh$1@caraway.media.kyoto-u.ac.jp... > wrote in message > news:c6lnr2$b3d$1@caraway.media.kyoto-u.ac.jp... > > やっぱまちがいですね。ほかにも，x+Δx=Xが変でした。 F(x)={f(x+h)-f(x)}/h ----(1) h→Δx で　F(x)=f'(x)　----(1') {F(x)-F(x-h)}/h -----(2) h→Δx で　F'(x)=f''(x) ----(2') (2)に(1)を代入すると {(f(x+h)-f(x))/h- (f(x)-f(x-h))/h}/h={f(x+h)+f(x-h)-2f(x)}/h^2 h→Δx で(2')より {f(x+h)+f(x-h)-2f(x)}/h^2=f''(x) こんなんでいいのだろうか。果たして(2')が言えるのだろうか？？？。 -- ****************************** keizi kounoike ******************************