- #1

CAF123

Gold Member

- 2,914

- 88

## Homework Statement

I have an expression for the partial derivative of u with respect to s, which is [tex] \frac{\partial\,u}{\partial\,s} = \frac{\partial\,u}{\partial\,x}x + \frac{\partial\,u}{\partial\,y}y [/tex]

How do I compute [itex] \frac{\partial^2u}{\partial\,s^2} [/itex] from this?