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From: eurms@apionet.or.jp (M_SHIRAISHI)
Newsgroups: fj.sci.math
Subject: Re: =?ISO-2022-JP?Q?Quiz=5F06iv2004=1B$B!J2rEz!K=1B(B?=
Date: 7 May 2004 10:50:14 -0700
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Xref: ccsf.homeunix.org fj.sci.math:974

"Y.N." <yoshiro@mail.wind.ne.jp> wrote in message news:<c7gh49$387$1@nr1.vectant.ne.jp>...
>
> Δx を x に無関係な定数と見れば


そうは見れないでしょう。 Δx:＝x_1−x と「定義」してるんだから。