Results 1 to 3 of 3

Math Help - Integration by substitution #2

  1. #1
    Junior Member
    Joined
    Mar 2011
    Posts
    72

    Integration by substitution #2

    Hi, I have a question which involves integration by substitution:

    \int \frac{y\,(y-8)}{(y-4)^2} dy

    using the substitution u = y - 4

    The answer is
    \frac{y^2-8y+32}{y-4}+c

    But I keep on getting
    \frac{y^2-4y+16}{y-4}+c

    Any help would be greatly appreciated
    Last edited by mr fantastic; December 1st 2011 at 12:19 PM. Reason: Title.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Mar 2011
    Posts
    72

    Re: Integration by substitution

    By the way, I wasn't sure if I should've posted this here or in the university calculus section, as I'm not actually in university, but the american education system is different to where I live, so I got a bit confused haha!
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member Quacky's Avatar
    Joined
    Nov 2009
    From
    Windsor, South-East England
    Posts
    901

    Re: Integration by substitution

    Quote Originally Posted by sakuraxkisu View Post
    By the way, I wasn't sure if I should've posted this here or in the university calculus section, as I'm not actually in university, but the american education system is different to where I live, so I got a bit confused haha!
    All calculus questions belong in the "calculus" subforum, regardless of your current level of study.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Integration by substitution
    Posted in the Calculus Forum
    Replies: 6
    Last Post: April 21st 2011, 02:03 PM
  2. Integration substitution.
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 20th 2011, 04:52 PM
  3. Integration by substitution
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 15th 2009, 05:28 AM
  4. integration by substitution
    Posted in the Calculus Forum
    Replies: 3
    Last Post: November 24th 2008, 08:11 PM
  5. integration by substitution
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 24th 2008, 07:20 PM

Search Tags


/mathhelpforum @mathhelpforum