1. Not finding help here? Sign up for a free 30min 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!

2nd derivative trouble

  1. Aug 25, 2008 #1
    f(x)=x/x^2+1
    f'(x)= 1-x^2/(x^2+1)^2
    But then I can't seem to work through taking the 2nd derivative, perhaps I am not using the chain rule right.
    I get -4x^5-2x^3-2x/(x^2+1)^4
    But thats not right... please help!
     
  2. jcsd
  3. Aug 25, 2008 #2

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    You double-posted, probably by accident. But let's stay in one thread.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: 2nd derivative trouble
  1. Derivation Trouble (Replies: 7)

  2. 2nd derivative rule (Replies: 4)

Loading...