Recent content by JohnLeee

  1. J

    Proving Total Derivative of jf+kg at a

    So should I approach this problem completely differently?
  2. J

    Proving Total Derivative of jf+kg at a

    Homework Statement If U⊆R^n is an open set with a ∈ U, and f: U->R^m and g: U->R^m are totally differentiable at a, prove that jf+kg is also totally differentiable at a and that (D(jf+kg))a = j(Df)a+k(Dg)a. Homework Equations The Attempt at a Solution Let p(x) = jf(x)+kg(x) Then...