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MathGroup Archive 2005

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Re: Re: Output display of exponential function in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62707] Re: [mg62686] Re: Output display of exponential function in Mathematica
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Fri, 2 Dec 2005 05:53:05 -0500 (EST)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

?E

E is the exponential constant e (base of natural logarithms), 
with numerical value approximately equal to 2.71828.

?Log

Log[z] gives the natural logarithm of z (logarithm to base e). 
Log[b, z] gives the logarithm to base b.

Log[1/E^2]

-2

E^-2

1/E^2

E^(-1/2)

1/Sqrt[E]


Bob Hanlon

> 
> From: New Guy <NewGuy at yahoo.com>
To: mathgroup at smc.vnet.net
> Date: 2005/11/30 Wed PM 10:08:53 EST
> Subject: [mg62707] [mg62686] Re: Output display of exponential function in Mathematica
> 
> On Sun, 27 Nov 2005 08:24:53 +0000 (UTC), Bob Hanlon 
<hanlonr at cox.net>
> wrote:
> 
> >The output that you want is "unstable", i.e., Mathematica automatically 
> >converts it.
> >
> 
> Thanks.
> 
> I have another question if you don't mind.
> 
> 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.
> 
> In mathematica, I tried Simplify[LN(1/e^2)] and it just spit the same
> thing out as the output.  I also tried a couple of variations of
> Solve[LN[1/e^2] = X] with essentially the same result
> 
> How would you get Mathematica to verify that the answer is -1/2.
> 
> Thanks a lot.
> 
> 


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