Completion requirements
Exercise 57
If \(f\) is homogeneous of degree \(n\), show that \(f_x(tx, ty) = t^{n-1}f_x(x, y)\)
If \(f\) is homogeneous of degree \(n\), show that \(f_x(tx, ty) = t^{n-1}f_x(x, y)\)