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August 24th, 2012, 12:05 AM  #1 
Newbie Joined: Aug 2012 Posts: 7 Thanks: 0  Partial Fraction
Hi,my name is Lvee.. Can anyone who expert in Partial Fraction Question teach me about this kind of question? i still cannot understand it...TQ 
August 24th, 2012, 12:22 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: Partial Fraction
What is the question, and I will move it to the appropriate forum and help with the question... Is it perhaps the question posted in this topic? 
August 24th, 2012, 01:12 PM  #3 
Newbie Joined: Aug 2012 Posts: 7 Thanks: 0  Re: Partial Fraction
The question is.... Express the fraction (20x^2+/(3x+1)(x+1)^2 as a sum of partial fractions. It will be, (20x^2+/(3x+1)(x+1)^2=(A/3x+1)+(B/(x+1)+(C/(x+1)^2 My question is why it become like this (A/3x+1)+(B/(x+1)+(C/(x+1)^2? (I mean with the constant A,B,C.) Thank you :P :P 
August 24th, 2012, 02:53 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,747 Thanks: 2133 
What alternatives could there be?

August 24th, 2012, 10:43 PM  #5 
Math Team Joined: Jul 2011 From: North America, 42nd parallel Posts: 3,372 Thanks: 233  Re: Partial Fraction
This site has a good explanation with examples, look at it then let me know if you still have questions. http://www.purplemath.com/modules/partfrac.htm I quote from the site "Sometimes a factor in the denominator occurs more than once. For instance, in the fraction 13/24, the denominator 24 factors as 2×2×2×3. The factor 2 occurs three times. To get the 13/24, there may have been a 1/2 or a 1/4 or a 1/8 that was included in the original addition. You can't tell by looking at the final result. In the same way, if a rational expression has a repeated factor in the denominator, you can't tell, just by looking, which denominators might have been included in the original addition. You have to account for every possibility." 
August 25th, 2012, 02:01 AM  #6 
Newbie Joined: Aug 2012 Posts: 7 Thanks: 0  Re: Partial Fraction
Thank you agentredlum 
August 26th, 2012, 07:19 AM  #7 
Newbie Joined: Aug 2012 Posts: 7 Thanks: 0  Re: Partial Fraction
Feel free to post a question okay... 
August 26th, 2012, 12:02 PM  #8  
Math Team Joined: Jul 2011 From: North America, 42nd parallel Posts: 3,372 Thanks: 233  Re: Partial Fraction Quote:
Find a partial fraction decomposition of let me know if you get stuck and I will help you get unstuck.  

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