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Re: Log Error ( ? )

  • To: mathgroup at smc.vnet.net
  • Subject: [mg78922] Re: Log Error ( ? )
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 13 Jul 2007 05:55:28 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <f74rf5$7uj$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

Log[] is the *natural* logarithm and Mathematica is perfectly right ..
you mean:

Plot[Log[10, x - 1] - 2, {x, 0, 101}]

Regards
   Jens

Larry wrote:
> Hi,
> 
> I had a question about something I found in Mathematica 5.2...   I was plotting Log[x-1]-2 with x = {0,10} and y =  {-10,5} and strangely found that the graph crossed the x-axes at approximately x == 8  ...
> 
> It should be 101 of course, but it seemed like 8.   Then I did an Nsolve with the equation set to 0, and low and behold got an answer x == 8.38906.
> 
> Is this a bug in mathematica or am I missing something here?
> 


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