Quiz

Let

        f(x,y,z) = x²y -2yz + z²

and let

        x(u,v) = 2u - 3v,     y(u,v)  =  u - v²,     z(u,v)  =  u² + 2v

A.  Come up with the chain rule that will help you find

B.  Use part A. to find the partial derivative of f with respect
      to v when u = 1 and v = 2.