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!

Problem with partial derivatives

  1. Mar 19, 2009 #1
    1. The problem statement, all variables and given/known data
    suppose that f(x,y)=f(y,x) for all (x,y)[tex]\in[/tex]R^2 show that
    (for partial derivative )
    Df/Dx (a,b)=Df/Dy(b,a)
    2. Relevant equations



    3. The attempt at a solution
    i don't know how to start
    can i do like this
    set g(x,y)=f(y,x)
    f o g (x,y) =f(x,y)
    then how to continue ?
     
  2. jcsd
  3. Mar 19, 2009 #2

    Mark44

    Staff: Mentor

    Re: proof

    Since you don't have much to go on, I'd suggest that you use the definition of the partial derivative for each of the two partials.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Problem with partial derivatives
Loading...