Results 1 to 2 of 2

Thread: Integral of xf(x)dx

  1. April 6th 2010, 04:10 PM #1
    maximade
    maximade is offline
    Junior Member
    Joined
    Oct 2009
    Posts
    30

    Question Integral of xf(x)dx

    I tried doing integration by parts, but I end up getting the wrong answer, help?
    Follow Math Help Forum on Facebook and Google+
  2. April 6th 2010, 04:58 PM #2
    chiph588@
    chiph588@ is offline
    MHF Contributor chiph588@'s Avatar
    Joined
    Sep 2008
    From
    Champaign, Illinois
    Posts
    1,163
    Let u=x\implies du=dx and dv=f(x)dx\implies v=\int f(x)dx .

    So we get \int xf(x)dx = x\int f(x)dx -\iint f(x)dx dx.

    Is this the answer you're looking for?
    Follow Math Help Forum on Facebook and Google+
« Definite Integral problem | Local Minimums and Maximums »

Similar Math Help Forum Discussions

  1. Use Cauchy's integral theorem for derivatives to evaluate the contour integral.
    Posted in the Calculus Forum
    Replies: 2
    Last Post: August 31st 2010, 07:38 AM
  2. Graph the region of integration and evaluate the double integral (integral from 0 to
    Posted in the Calculus Forum
    Replies: 1
    Last Post: June 2nd 2010, 02:25 AM
  3. Explaining result: comparing line integral and two-form integral
    Posted in the Calculus Forum
    Replies: 0
    Last Post: May 9th 2010, 01:52 PM
  4. [SOLVED] Line integral, Cauchy's integral formula
    Posted in the Differential Geometry Forum
    Replies: 3
    Last Post: September 15th 2009, 01:28 PM
  5. write [integral of] dx/SQRT(sinx) in terms of an elliptic integral
    Posted in the Calculus Forum
    Replies: 0
    Last Post: September 10th 2008, 07:53 PM

Search Tags


/mathhelpforum @mathhelpforum