So
and so on so forth. Thats the chain rule. Do you get it?
Then the product rule states
Use them together i.e. differentiate once and the 2nd time use the product rule also.
Im having a little trouble with this question:
Given that z = f(u) where u = x+my and f is an arbitrary function, find the two values of m for which z satisfies the equation
12(d^2z/dx^2) + (d^2z/dxdy) - (d^2z/dy^2) = 0
where all the derivatives are partial derivatives
So
and so on so forth. Thats the chain rule. Do you get it?
Then the product rule states
Use them together i.e. differentiate once and the 2nd time use the product rule also.