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November 10th, 2011, 08:29 AM  #1 
Newbie Joined: Nov 2011 Posts: 4 Thanks: 0  Log help for a not so good math student!
Can someone help me answer these log equations... Use the properties of logarithms to write the expression as a sum, difference, and/or constant multiple of logarithms(assume all variables are positive) 1.) Log(10) Y/2 2.) Log(6) z3 And these as well Write the expression as the logarithm of a single quantity. 1.) 1/3 log(3) 5x 2.) ln(x2)ln(x+2) Could you please do it step by step because I am confused...Thank you very much for your help!! 
November 10th, 2011, 08:45 AM  #2 
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4  Re: Log help for a not so good math student!
What are the "properties of logs" ?? I know the answer, and believe that You should ask yourself this question. log(ab) = log(a) + log(b) is one property. log(6) = log(3) + log(2) is an example of this property. If you can name the properties and explain them in plain English, you will be able to do these problems. Also, should it read "z  3", or "z^3" ? 
November 10th, 2011, 08:56 AM  #3  
Newbie Joined: Nov 2011 Posts: 4 Thanks: 0  Re: Log help for a not so good math student! Quote:
z^3(3 exponent) Thanks for the info and I will give it a shot... For the first one...is it log(3) 1/3+x^5?  
November 10th, 2011, 11:14 AM  #4 
Newbie Joined: Nov 2011 Posts: 4 Thanks: 0  Re: Log help for a not so good math student!
Can anyone help me out These 2 (Write the expression as the logarithm of a single quantity) 1.) 1/3 log(3) 5x 2.) ln(x2)ln(x+2) 1.)Log(10) Y/2 2.) Log(6) z^3 I'm not being lazy...I legitimately don't understand how to do them and how to get the correct answer. 
November 10th, 2011, 11:35 AM  #5 
Newbie Joined: Nov 2011 Posts: 4 Thanks: 0  Re: Log help for a not so good math student!
Chaz is this one of the correct answers? For log(6)z^3 I got 13log(6)z 
November 18th, 2011, 09:59 AM  #6 
Global Moderator Joined: Dec 2006 Posts: 20,262 Thanks: 1958 
Where did the "1" come from? You need to use the rule that 

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