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MathGroup Archive 2005

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Re: Is the answer for this Integral correct???

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54310] Re: Is the answer for this Integral correct???
  • From: "Scout" <user at domain.com>
  • Date: Wed, 16 Feb 2005 14:36:59 -0500 (EST)
  • References: <curuei$t3l$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

For x in complex numbers, yes.
But not for x in Reals!
If you write:

[In]:=
           Integrate[ Log[x] / x , {x, -1, 1}, Assumptions-> 
x\[Element]Reals]

you obtain:

 [Out]:=
             "Integral of ... does not converge on ..." etc.

~Scout~

"zeno" <zeno333 at mindspring.com> ha scritto nel messaggio 
news:curuei$t3l$1 at smc.vnet.net...
> Using Mathematica 4.2, I get the answer of 0 for this Integral....
>
> Integrate[Log[x]/x, {x, -1 , 1}]
>
> Is this the correct answer???
>
> Mathemtica output below......
> ___________________________
>
> In[3]:=  (21:43:17 on 2/14/05
> Integrate[Log[x]/x, {x, -1 ,1}]
>
> Out[3]=  (21:43:17 on 2/14/05)
> 0
> 


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