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Re: Log Function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68191] Re: [mg68176] Log Function
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Sat, 29 Jul 2006 01:00:05 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

Log[15] is exact and will remain in that form until an inexact result is requested

{Log[15],Log[15.],N[Log[15]]}

{log(15),2.70805,2.70805}

Exp[%]

{15,15.,15.}

{Log[2,15], Log[2.,15],Log[2,15.],N[Log[2,15]]}

{Log[15]/Log[2], 3.90689, 3.90689, 3.90689}

2^%

{15,15.,15.,15.}


Bob Hanlon

---- Joe <joealan at mac.com> wrote: 
> I am very new so please be gentle. I am attempting to use Mathematica 
> 5.2 for the first time and I am in trouble already. I want to take the 
> log of 15. I have tried log[2., 15] and I get an echo. I tried 
> N[log[2.,15]] I get a buzzer. What am I doing wrong?
> 
> Thanks
> Joe
> 


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