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MathGroup Archive 2005

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Re: Output display of exponential function in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62703] Re: Output display of exponential function in Mathematica
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Thu, 1 Dec 2005 00:46:11 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

On 11/30/05 at 10:08 PM, NewGuy at yahoo.com (New Guy) wrote:

>I'm trying to just check and see if I got a whole bunch of
>even-numbered study exercises right on exponents and natural logs.
>The answers to the odds are in the book.

>As an example, LN(1/e^2) equals what?

>My answer is -1/2.

I assume by LN you mean the natural logarithm and by e you mean the number 2.718... If so, the natural logarithm is written as Log in Mathematica and 2.718... is written as E, not e

Assuming this is what you meant you should expect Mathematica to return -2 not -1/2. And that is exactly what happens with proper syntax, i.e.,

In[1]:=Log[1/E^2]
Out[1]=-2
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