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Re: Possible bug concerning a limit computation

• To: mathgroup at smc.vnet.net
• Subject: [mg71151] Re: [mg71107] Possible bug concerning a limit computation
• From: Gerry Flanagan <flanagan at materials-sciences.com>
• Date: Thu, 9 Nov 2006 03:38:47 -0500 (EST)
• References: <200611081116.GAA22490@smc.vnet.net>

Version 5.2 gets positive 9.2.

Gerry F.

geo_topos wrote:

>Hello everyone,
>I don't know if this is the right place to post this, but here it goes.
>I am a high-school math teacher from greece. I was working with my
>students on the limit:
>
>Limit[ (Sqrt[7x^4+6x+5] - Sqrt[7x^4+3x+3]) * Sqrt[63x^2-5x+20, x->
>Infinity]
>
>The result we got for that is 9/2. Mathematica 4.0 will produce the
>opposite result: -9/2.
>If anyone is interested on the way we calculated this limit, please
>e-mail me and I will be more than happy to send you a copy of our
>computation, since it would take me ages to type this in ASCII and
>furthermore it would be, at least, annoying to the viewer.
>
>Excuse my rusty english, best regards
>Kostas Raptis
>
>
>  
>

• References:
  • Possible bug concerning a limit computation
    • From: "geo_topos" <geo_topos@yahoo.co.uk>