Here I want to show that given Y=Z/X is indep. of Z and X, where X,Z>0 show that Y is a constant.
The hints I got are to consider:
both of which equal 0 since
then defining a new variable U=1/Y which is supposed to help somehow
and then considering V(Y).
I need help in understanding how to tie these hints together to get the final answer (V(Y)=0)