"Y.N." <yoshiro@mail.wind.ne.jp> wrote in message news:<c7dpit$3n$1@nr1.vectant.ne.jp>...
> On 5 May 2004 17:41:07 -0700
> eurms@apionet.or.jp (M_SHIRAISHI) wrote:
> 
> M> "Y.N." <yoshiro@mail.wind.ne.jp> wrote in message
> M> news:<c6u2ik$10h$2@nr1.vectant.ne.jp>...
> M> > ?x ? x ????????????
> M> > ???????????????????
> M> 
> M> 
> M> ??*???*????????*??*??????????
> 
> ???x?x_1?x ?????
> 
> d^2 y?d(f'(x)?x)?d(f'(x)(x_1?x))?{f'(x)(x_1?x)}'?x
> ?{f''(x)(x_1?x)-f'(x)}?x?f''(x)(?x)^2 - f'(x)?x
> ???
> 
> d^2 y?f''(x)(dx)^2 - f'(x)dx
> 
> ????????????????????????????? 
> d^2 y/dx^2 ?f''(x) ??????????
> 
> ????????????????????????????????????
> ????
> 
> ????????????????????????????????????
> ???


dy??f'(x)??x ?????????????????????????????
????????????????????d^2y?f''(x)dx^2 ?????????
????????

??????p.51 ???d^2y?f''(x)dx^2 ????????????????
?????????????????????????????????????
???


> ?? M_SHIRAISHI ???????????????????????x?x_1?
> x????????????????? ????????????????(..)?


??x?x_1?x????????? p.35 ??????????????????
????????????????????