Results 1 to 5 of 5

Math Help - Table of Integral

  1. #1
    Junior Member
    Joined
    Mar 2009
    Posts
    26

    Table of Integral

    I need to figure out how to derive it. I know you use partial fractions, but again with no numbers, the letters always change, part of it is my dyslexia.. thank you.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Banned
    Joined
    Feb 2009
    From
    Posts
    79
    ̣Use partial fraction treat a and b as simple numbers. It will work out.










    ̣
    Last edited by mr fantastic; May 16th 2009 at 08:20 PM. Reason: Putting the edit note of the user in the main body of the post.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Banned
    Joined
    May 2009
    Posts
    471
    Quote Originally Posted by Collegeboy110 View Post
    I need to figure out how to derive it. I know you use partial fractions, but again with no numbers, the letters always change, part of it is my dyslexia.. thank you.

    \frac{d+cx}{(x-a)(x-b)}=\frac{A}{x-a}+\frac{B}{x-b}\Rightarrow d+cx=A(x-b)+B(x-a) so A+B=c and -Ab-aB=d

    So A=\frac{ac+d}{a-b} and B=-\frac{bc+d}{a-b}

    From here you should be okay
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Mar 2009
    Posts
    26
    I get this part, but I cant do the next step.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Banned
    Joined
    May 2009
    Posts
    471
    so \int\frac{d+cx}{(x-a)(x-b)}dx=\int[\frac{ac+d}{(a-b)(x-a)}-\frac{bc+d}{(a-b)(x-a)}]dx= what we want it to be
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Change of Variable, table of integral, and constant of integration
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: April 20th 2011, 05:22 AM
  2. table
    Posted in the LaTeX Help Forum
    Replies: 3
    Last Post: February 14th 2009, 01:41 PM
  3. table salt + table sugar
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: September 9th 2007, 08:35 AM
  4. integral using a table
    Posted in the Calculus Forum
    Replies: 5
    Last Post: September 7th 2007, 07:21 PM
  5. solving an integral using the table
    Posted in the Calculus Forum
    Replies: 9
    Last Post: September 6th 2007, 10:20 AM

Search Tags


/mathhelpforum @mathhelpforum