Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Calculate second order derivative

  1. Dec 7, 2011 #1
    Calculate f" for f(x)=g(e^(2x)), where g is a function defined for all real numbers & g admits second order derivative.

    please check if I did it right.
    f = g(e2x)
    f' = 2e2x g'
    f'' = 4e2xg' + 2e2xg''

    I have expanded out

    4e2xg'(u) + 2e2xg''(u)
     
  2. jcsd
  3. Dec 7, 2011 #2

    mathman

    User Avatar
    Science Advisor

    Fix your equations. g is ending up in the exponent.
     
  4. Dec 7, 2011 #3
    4e2xg'(u) + 2e2xg''(u)
     
  5. Dec 7, 2011 #4
    4e2xg'(u) + 4e4xg''(u)

    when taking the derivative of the derivative you forget the factor 2e2x
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...