MathGroup Archive 2003

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Asymptote strangeness...

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38862] Re: Asymptote strangeness...
  • From: "David W. Cantrell" <DWCantrell at sigmaxi.org>
  • Date: Thu, 16 Jan 2003 03:20:57 -0500 (EST)
  • References: <b033br$n11$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Mike Summers <mike at miscanthus.net> wrote:
> It seems to me that this:
>
> f[x] = (x + 2)/(Abs[x] - 2)
>
> should have asymptotes at 2 & -2.
>
> Plot[Evaluate[f[x]], {x, -5, 5}] only shows the asymptote at 2.
>
> Suggestions?

Mainly, that you should re-examine why you think that it should have a
vertical asymptote at -2. There should be no asymptote there because
-2 is a first-degree zero of _both_ numerator and denominator.

David


  • Prev by Date: Re: Asymptote strangeness...
  • Next by Date: Re: Modifying arguments of sub-parts of an expression
  • Previous by thread: Re: Asymptote strangeness...
  • Next by thread: Re: Asymptote strangeness...