This is my first post so I do not know how to properly insert the partial derivative symbol, therefore “d” stands not for derivative but for partial derivative.
I have been trying to solve this exercise since Friday and I have no idea what to do:
d^(137)f / [(dx^(72))(dy^3)(dx)(dx)(dy^(60))]
for f(x,y) = cos (2x – y)
Any suggestions will help