- #1
jimmycricket
- 116
- 2
Im doing a question on functionals and I have to use the Euler lagrange equation for a single function with a second derivative. My problem is I don't know how to evaluate [itex]\frac{d^2}{dx^2}(\frac{\partial F}{\partial y''})[/itex]. Here y is a function of x, so [itex]y'=\frac{dy}{dx}[/itex].
I know this is probably something I should be able to do by this stage but such is life.
I know this is probably something I should be able to do by this stage but such is life.