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>