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: Evaluate the integral using the integration limits

  1. Nov 20, 2012 #1
    1. The problem statement, all variables and given/known data

    (Between 0-3) ∫x3/√(x2+9)

    3. The attempt at a solution

    I attempted U sub, but that didn't work. Neither did integration by parts; however, I do remember my teacher using a method involving sub'ing an "x" or something.


    Will edit in attempts as I search YouTube for tutorials.
  2. jcsd
  3. Nov 20, 2012 #2
    Are you sure that integration by parts doesn't work? I'll recommend that you try again, and perhaps show your work.
  4. Nov 20, 2012 #3


    User Avatar
    Homework Helper

    Or substitute y=x^+9.

  5. Nov 20, 2012 #4


    User Avatar
    Homework Helper

    Both methods work well here. For IP, use the exact same initial step like in the problem I took you through. ehild's sub also works very well, and quickly gives you an answer.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook