Math Help Forum

Math Help Forum Feed Site Feed

Go Back   Math Help Forum > Pre-University Math Help > Pre-Calculus
Reply
 
Thread Tools Display Modes
  #1  
Old November 21st, 2008, 01:10 AM
Junior Member
 
Join Date: Aug 2008
Posts: 40
Country:
Thanks: 19
Thanked 0 Times in 0 Posts
Kitty216 is on a distinguished road
Default expanding expression using properties of logarithms

Use the properties of logarithms to expand the expression.



Can anyone help me with this one?
Reply With Quote
Advertisement
 
  #2  
Old November 21st, 2008, 11:30 AM
Moo's Avatar
Moo Moo is offline
A Cute Angle
 
Join Date: Mar 2008
Location: P(I'm here)=1/3, P(I'm there)=t+1/3
Posts: 5,010
Country:
Thanks: 504
Thanked 2,893 Times in 2,377 Posts
Moo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond reputeMoo has a reputation beyond repute
Default

Hello,

Ummm well, the only log properties you can use are :
\ln(ab)=\ln(a)+\ln(b)
\ln \left(\frac ab \right)=\ln(a)-\ln(b)
\ln \left(a^b\right)=b \ln(a)

So here we have :
\ln \left[\frac{(3x^6+2) \sqrt{x+8}}{(x-1)^4}\right]=\ln [3x^6+2]+\ln \left[\sqrt{x+8}\right]-\ln \left[(x-1)^4\right]
that was using the first 2 properties.

now use the last one :
=\ln [3x^6+2]+\frac 12 \cdot \ln [x+8]-4 \ln [x-1]

but it doesn't look more beautiful
__________________
Everything is possible. The impossible just takes longer.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

shinhidora production

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
The following users thank Moo for this useful post:
Donate to MHF
  #3  
Old November 21st, 2008, 04:17 PM
Junior Member
 
Join Date: Aug 2008
Posts: 40
Country:
Thanks: 19
Thanked 0 Times in 0 Posts
Kitty216 is on a distinguished road
Default

oh I thought there was much more to it haha.. wow it looked more beautiful just the way it was in the beginning XD.

Thanks for the help!
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump


All times are GMT -7. The time now is 09:54 PM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.2.0 ©2008, Crawlability, Inc.
©2005 - 2009 Math Help Forum


Math Help Forum is a community of maths forums with an emphasis on maths help in all levels of mathematics.
Register to post your math questions or just hang out and try some of our math games or visit the arcade.