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
February 23rd, 2015, 04:58 PM   #1
Senior Member
 
Joined: Jan 2015
From: USA

Posts: 107
Thanks: 2

logarithms

Im having trouble with this log problem. please help!
Attached Images
File Type: jpg Log.jpg (13.7 KB, 8 views)
matisolla is offline  
 
February 23rd, 2015, 06:41 PM   #2
Math Team
 
Joined: Jul 2011
From: Texas

Posts: 2,640
Thanks: 1319

$\log_2(x-1)-\log_4(x+3)=\frac{1}{2}$

Use a change of base ... $\log_4{a}=\frac{\log_2{a}}{\log_2{4}}$

Also note $\frac{1}{2}=\log_2{\sqrt{2}}$

Once you get every log in base 2, then use your log properties to set up an equation in the form $\log_2{p}=\log_2{q} \implies p=q$
skeeter is offline  
February 23rd, 2015, 07:34 PM   #3
Math Team
 
Joined: Dec 2006
From: Lexington, MA

Posts: 3,267
Thanks: 407

Hello, matisolla!

Quote:




















soroban 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 please help ! hi2you Math 6 January 31st, 2015 06:21 PM
Need help with Logarithms Shawn Algebra 4 May 23rd, 2013 11:50 AM
Logarithms, what are they? yyttr4 Algebra 1 June 21st, 2010 07:57 PM
Logarithms adhiluhur Algebra 1 June 13th, 2010 03:00 AM
need help, logarithms stekemrt Abstract Algebra 11 November 21st, 2007 10:37 AM





Copyright © 2017 My Math Forum. All rights reserved.