My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
June 21st, 2010, 05:39 PM   #1
Newbie
 
Joined: May 2010

Posts: 23
Thanks: 0

Logarithms, what are they?

I know all the properties of a logarithm, how it is defined, what it is used for.

But I have yet to find, or have anyone tell me, what a logarithm is.

I could easly enter this into a calculator, or estimate it on paper.
But how do I do this without estimation, without a calculator or table, just my mind and a pen. And how do I derive that method?

And how where logarithms originally defined? I know there must have been much more rigor and understanding in the original explanations.
yyttr4 is offline  
 
June 21st, 2010, 07:57 PM   #2
Senior Member
 
Joined: Aug 2008
From: Blacksburg VA USA

Posts: 353
Thanks: 7

Math Focus: primes of course
Re: Logarithms, what are they?

Try this hit off of Google: http://cnx.org/content/m18236/latest/. As far as derivation, it is just an inverse operation like add/subtract or multiply/divide. If the log is the inverse of raising to an exponent, then if A=10^B, then log(A)=B. 100=10^2, so log(100)=2. That's the extent of what I can speak to.
billymac00 is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
logarithms



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
logarithms! Mindless_1 Algebra 2 November 14th, 2012 12:02 PM
logarithms empiricus Algebra 14 July 19th, 2010 05:31 PM
logarithms again! empiricus Algebra 8 July 9th, 2010 08:31 AM
need help, logarithms stekemrt Abstract Algebra 11 November 21st, 2007 10:37 AM
logarithms!!!!!!!!!!! Mindless_1 Abstract Algebra 0 December 31st, 1969 04:00 PM





Copyright © 2019 My Math Forum. All rights reserved.