Recent content by rabbleguy

  1. R

    How do I expand the chain rule to second partial derivatives?

    We have f(x(y,z),t(y,z)). This is more of a study question. I don't know how to expand out d^{2}f/dz^2 I know df/dz = df/dx*dx/dz + df/dt*dt/dz, but I don't know how to expand this to the 2nd derivative. I think the product rule comes into play? Not really sure. Thanks for your help.