Hi,

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:

Compute

d^(137)f / [(dx^(72))(dy^3)(dx)(dx)(dy^(60))]

for f(x,y) = cos (2x – y)

Any suggestions will help

thanks!