Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Conceptual problem with integration by parts.

  1. Sep 7, 2009 #1
    Why is it that whenever we encounter a question which can be solved by integration by parts, we get half the function?

    I mean, suppose a differentiated f(x)g(x) yielded [tex]{f'(x) g(x)dx + f(x)g'(x)dx}[/tex], then why do we get only [tex]{f'(x) g(x)dx}[/tex] to extract the original function (f(x)g(x)) from?
     
  2. jcsd
  3. Sep 7, 2009 #2
    Ok...let's forget about this question for now...dont answer it.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook