In: Math
Consider the given function
For evaluating th partial derivative of 'f(x,y,z) ' with respect to x we need to consider only the variable terms involving x while fixing y and z as constants. So
here both are considered as constants
In general
hence
now on finding the second partial derivative
Similarly we can find partial derivative with respect to y as follows
on finding its second order partial derivative
Now consider partial derivative with respect to z
On evaluating its second derivative