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
April 30th, 2014, 06:43 PM   #1
Newbie
 
Joined: Apr 2014
From: Boulder, Colorado

Posts: 3
Thanks: 0

logarithm help algebra 2

IMG_2862.jpgI am doing an online Algebra II course and am having a hard time understanding an example given, which I have attached a picture of to this post (at least I think I'm pretty sure I was able to). The part that is confusing me is step three. I understand that ten is the common logarithm but I am failing to see how they got from log ((n+9)/4n) = 0 to 10^0 = (n+9/4n. If someone could explain this to me that would be great. Thanks.

By the way I realize this is my second post about this but I forgot to attach the link to the first one and have no idea how to delete it.

Last edited by FinlayB; April 30th, 2014 at 06:47 PM.
FinlayB is offline  
 
April 30th, 2014, 07:01 PM   #2
Math Team
 
Joined: Dec 2013
From: Colombia

Posts: 7,697
Thanks: 2681

Math Focus: Mainly analysis and algebra
This is one definition of the logarithm.
$$\log_a{b} = c \iff a^c = b$$
v8archie is offline  
April 30th, 2014, 07:05 PM   #3
Newbie
 
Joined: Apr 2014
From: Boulder, Colorado

Posts: 3
Thanks: 0

thank you so much! Just as a side note would I use those same steps in solving the equation log(5x) = log(2x+9)?
FinlayB is offline  
April 30th, 2014, 07:27 PM   #4
Math Team
 
Joined: Dec 2013
From: Colombia

Posts: 7,697
Thanks: 2681

Math Focus: Mainly analysis and algebra
You could do, yes.
v8archie is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
algebra, logarithm, logarithms, logs



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
logarithm anco995 Algebra 5 December 16th, 2012 03:36 AM
Logarithm Algebra 4 February 16th, 2012 06:40 AM
Big-O for Logarithm sea_wave Applied Math 2 October 24th, 2009 03:45 AM
logarithm HHH Algebra 5 September 27th, 2009 05:05 PM
logarithm anco995 Calculus 0 December 31st, 1969 04:00 PM





Copyright © 2019 My Math Forum. All rights reserved.