I need to find the higher order partial derivative of a function. (Need to find: $\frac{\delta ^2 f}{\delta u^2}$ and $\frac{\delta ^2 f}{\delta v^2}$)
The problem is that the function is not specified only given as a function of x and y. $f(x,y)$
It's also been given that $x=Au + Bv$ and that $y=Cu + Dv$ (Kindly note that the uppercase letters are constants not variables)
I have managed to get till the first partial derivatives. I.e. $\frac{(\delta f)}{(\delta u)}$ and $\frac{(\delta f)}{(\delta v)}$
Unfortunately getting to the second derivative is where I'm completely stumped, all the solutions I found online aren't applicable as they require that the function isn't arbitrary.
Any help would be super appreciated