Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54274] Re: Is the answer for this Integral correct???
  • From: Max Goldfarb <TheMuati at verizon.net>
  • Date: Wed, 16 Feb 2005 14:35:54 -0500 (EST)
  • References: <curuei$t3l$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

zeno wrote:
> 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
> 

if you look at the graph of this function, it is asymptotic at zero, so 
the area is kinda infinite.  It isn't defined from -1 to 0, so the 
bounds can be changed.  So... the answer Mathematica gave was not right, 
  I guess.


  • Prev by Date: Re: Is the answer for this Integral correct???
  • Next by Date: EulerianCycle in graphs
  • Previous by thread: Re: Is the answer for this Integral correct???
  • Next by thread: Re: Is the answer for this Integral correct???