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: Need help finding an antiderivative

  1. Jan 28, 2009 #1
    need help finding an antiderivative!!!!!

    1. The problem statement, all variables and given/known data
    1
    ∫ 36/ (2x + 1) ^3 dx
    0
    I just can't figure out how to take the antiderivative of this! What do I do with the (2x +1) ^3??

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jan 28, 2009 #2
    Re: need help finding an antiderivative!!!!!

    set u=2x+1 and do u-substitution
     
  4. Jan 28, 2009 #3
    Re: need help finding an antiderivative!!!!!

    ok! I get it. I was looking in the wrong part of the book and I thought the directions said to use part 2 of the fundamental theorem! So I was freaking out because I was sure the theorem couldn't be used for this. thanks! sorry I asked a stupid question.
     
  5. Jan 28, 2009 #4
    Re: need help finding an antiderivative!!!!!

    haha no problem. there are no stupid questions! :smile:
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook