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MathGroup Archive 2003

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Re: This should evaluate to zero

  • To: mathgroup at smc.vnet.net
  • Subject: [mg39967] Re: [mg39926] This should evaluate to zero
  • From: Dr Bob <drbob at bigfoot.com>
  • Date: Thu, 13 Mar 2003 03:03:32 -0500 (EST)
  • References: <200303120728.CAA19055@smc.vnet.net>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

Here's a proof that the answer is zero:

{ArcSinh[1], Log[3363 + 2378*Sqrt[2]]/10}
% // TrigToExp
Exp /@ %
% // Simplify
#^10 & /@ %
% // Expand

However, Simplify and FullSimplify can't be expected to know this.

Bobby

On Wed, 12 Mar 2003 02:28:18 -0500 (EST), jf alcover <jf.alcover at bdpme.fr> 
wrote:

> Bonjour,
> Methinks that the following expression should evaluate to zero,
> but it does not, even with FullSimplify :
> ArcSinh[1]-Log[3363+2378*Sqrt[2]]/10
> Could anyone explain ?
>
>



-- 
majort at cox-internet.com
Bobby R. Treat



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