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: Indefinite Integral

  1. Dec 4, 2011 #1
    I'm having a problem with the following integral: x^3/sqrt[1 + x^2] dx

    Can this be done with substitution or integration by parts?
    Throw me some hints at this one please!

    Sorry I forgot to include my attempt.

    I tried solving this by substitution, letting u=1-x^2. Then letting (-1/2)du = xdx. Simplifying it down and came to the answer of 1/3(1-x^2)-sqrt(1-x^2) + C
    Last edited: Dec 4, 2011
  2. jcsd
  3. Dec 4, 2011 #2
    Please make an attempt at the solution, or this thread will be deleted.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook