Results 1 to 3 of 3

Thread: [SOLVED] Integration by parts help...

  1. February 1st 2010, 12:01 AM #1
    stickyMATH
    stickyMATH is offline
    Newbie
    Joined
    Jan 2010
    Posts
    6

    Talking [SOLVED] Integration by parts help...

    Can someone please help me with this problem I am stuck!

    <br /> \int 3arctan(2x)dx<br />

    My first step has been:
    dv = 3 dx
    v= 3x
    u = arctan(2x)
    du = [1/(1+4x^2)]*2

    Giving me...
    <br /> 3xarctan(2x) - \int 3x*[1/(1+4x^2)]*2dx

    Thanks!!!!!
    Follow Math Help Forum on Facebook and Google+
  2. February 1st 2010, 12:03 AM #2
    mr fantastic
    mr fantastic is offline
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,953
    Thanks
    5
    Quote Originally Posted by stickyMATH View Post
    Can someone please help me with this problem I am stuck!

    <br /> \int 3arctan(2x)dx<br />

    My first step has been:
    dv = 3 dx
    v= 3x
    u = arctan(2x)
    du = [1/(1+4x^2)]*2

    Giving me...
    <br /> 3xarctan(2x) - \int 3x*[1/(1+4x^2)]*2dx

    Thanks!!!!!
    To solve the new integral substitute w = 1 + 4x^2.
    Follow Math Help Forum on Facebook and Google+
  3. February 1st 2010, 12:12 AM #3
    stickyMATH
    stickyMATH is offline
    Newbie
    Joined
    Jan 2010
    Posts
    6
    Ahhhh I was not going that direction! Thanks!
    Follow Math Help Forum on Facebook and Google+
« Evaluating limits... | Series »

Similar Math Help Forum Discussions

  1. [SOLVED] Integration by Parts
    Posted in the Calculus Forum
    Replies: 5
    Last Post: May 1st 2009, 07:04 AM
  2. [SOLVED] Integration by Parts Help
    Posted in the Calculus Forum
    Replies: 4
    Last Post: February 13th 2009, 03:56 PM
  3. [SOLVED] Integration by parts...I think...
    Posted in the Calculus Forum
    Replies: 6
    Last Post: September 7th 2008, 11:48 PM
  4. [SOLVED] Integration by parts with a natural log
    Posted in the Calculus Forum
    Replies: 4
    Last Post: August 31st 2008, 06:26 PM
  5. [SOLVED] Integration by parts
    Posted in the Calculus Forum
    Replies: 4
    Last Post: August 31st 2008, 03:15 PM

Search Tags


/mathhelpforum @mathhelpforum