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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!ux1.cso.uiuc.edu!news.cso.uiuc.edu!uxa.cso.uiuc.edu!das50852
- From: das50852@uxa.cso.uiuc.edu (dan)
- Subject: Re: An interesting limit problem.
- References: <1992Jul25.212844.1@lure.latrobe.edu.au>
- Message-ID: <Bs1xzu.DFp@news.cso.uiuc.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: University of Illinois at Urbana
- Date: Mon, 27 Jul 1992 14:38:16 GMT
- Lines: 38
-
- mattm@lure.latrobe.edu.au writes:
-
- >A challenge to all mathematicians. A 100 years ago, this would probably have
- >been solved fairly simply in a natural way, but can you? I think that this
- >problem was first posed by the Russian mathematician Arnold. Hope you find this
- >problem as interesting as I did when I first solved it.
-
- > sin(tan x) - tan(sin x)
- > lim ---------------------------------- = ???
- > x->0 arcsin(arctan x) - arctan(arcsin x)
-
-
- Hmmmm, Mathenatica likes this:
-
- In[1]:= f[x_] = Sin[Tan[x]]-Tan[Sin[x]]
- Out[1]= Sin[Tan[x]] - Tan[Sin[x]]
-
- In[2]:= g[x_] = ArcSin[ArcTan[x]] - ArcTan[ArcSin[x]]
- Out[2]= ArcSin[ArcTan[x]] - ArcTan[ArcSin[x]]
-
- In[3]:= Limit[ f[x]/g[x], x->0]
- [Dan counts as the NeXT humms; only got to 2 though]
- Out[3]= 1
-
- Will someone please back me up, and say that no one learning
- Calculus should ever be allowed anywhere _NEAR_ Mathematica?
- (When I say 'learning Calculus' I mean the first two or three
- semesters) I watched one of my roomates struggle thru his
- second and third semesters of 'Calculus and Mathematica', and
- it seemed that the basics got skipped, so that the stuff for
- which Mathematica is useful was just more confusing. Any thoughts?
-
-
- dan simms
-
- -----
- artie@uiuc.edu
-
-