Results 1 to 4 of 4

Math Help - Evaluate a integral

  1. #1
    Junior Member
    Joined
    Sep 2005
    Posts
    62

    Evaluate a integral

    Would I use Partial Fractions for this integral? I'm not sure what to do.

    \frac{1}{(x+1)(x+3)}dx
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by killasnake View Post
    Would I use Partial Fractions for this integral? I'm not sure what to do.

    \frac{1}{(x+1)(x+3)}dx
    yes. use partial fractions.

    write \frac 1{(x + 1)(x + 3)} = \frac A{x + 1} + \frac B{x + 3}

    now find A and B, similar to how i told you to in your last thread
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Sep 2005
    Posts
    62
    okay cool thank you!
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Global Moderator

    Joined
    Nov 2005
    From
    New York City
    Posts
    10,616
    Thanks
    9
    Do not use partial fraction.

    \frac{1}{(x+1)(x+3)} = \frac{1}{2}\cdot \frac{(x+3) - (x+1)}{(x+1)(x+3)} = \frac{1}{2(x+1)} - \frac{1}{2(x+3)}.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: August 31st 2010, 07:38 AM
  2. Replies: 1
    Last Post: June 2nd 2010, 02:25 AM
  3. Replies: 1
    Last Post: November 28th 2009, 08:44 AM
  4. Evaluate the integral using the FTC I
    Posted in the Calculus Forum
    Replies: 5
    Last Post: July 7th 2009, 05:29 AM
  5. How do you evaluate this integral?
    Posted in the Calculus Forum
    Replies: 4
    Last Post: September 15th 2008, 04:12 AM

Search Tags


/mathhelpforum @mathhelpforum