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Re: Integral problem

• To: mathgroup at smc.vnet.net
• Subject: [mg65664] Re: Integral problem
• From: dh <dh at metrohm.ch>
• Date: Wed, 12 Apr 2006 06:00:23 -0400 (EDT)
• References: <e1fq2r$bmo$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi Ivan,
Both are correct, amazing, but easy.
Remember that an indefinite is determined up to a constant. Now, the 
only difering term is:
Log[2-x^4]
and
Log[x^4-2]
this can be written as:
Log[-1(2-x^4)] == Log[-1] + Log[2-x^4]
and you see that they differ only by a constant.

Daniel

ivan.svaljek at gmail.com wrote:
> I've tried running an integral expression through mathematica 5.0 and
> came up with this:
> 
> http://aspspider.net/isvaljek/mathematica/index.html
> 
> First two are from mathematica, and the last one is from a site running
> web mathematica.
>