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 with Integral

  1. Aug 21, 2005 #1
    [tex] \int \frac{\(x+9}{x^2+9} dx [/tex]

    I am not sure where to start. I have a feeling that I need to subsitute twice, but I just don't know what to use first. Any help is appreciated.
  2. jcsd
  3. Aug 21, 2005 #2


    User Avatar
    Homework Helper


    [tex] \int \frac{x dx}{x^{2}+9} + 9 \int \frac{dx}{x^{2}+9} [/tex]
  4. Aug 21, 2005 #3
    Wow, that changes everything, ln and tan inverse I think just looking at it, let me try this, I can't believe I overlooked that.
  5. Aug 21, 2005 #4
    Yea, I solved it, thank you for the help.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook