1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Help calculus

  1. Oct 5, 2007 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    [tex]\int u'*v = u*v - \int u*v'[/tex]

    3. The attempt at a solution

    i know the answer is [tex]\frac{-2ln(9x)-1}{x^2}[/tex]

    but i dont understand the step [tex]\int u*v'[/tex]

    if any could help me....thanks
  2. jcsd
  3. Oct 5, 2007 #2


    User Avatar
    Homework Helper

    what don't you understand

    u means u
    [tex]v'[/tex] means [tex]dv[/tex]
  4. Oct 5, 2007 #3

    thks i understand now
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook