- Verify that (z)=(z)(1(z)) - One gotcha with the cross-entropy is that it can be difficult at first to remember the respective roles of the ys and the as. It's easy to get confused about whether the right form is: [yln(a)+(1y)ln(1a)]or[aln(y)+(1a)ln(1y)] What happens to the second of these expressions when y=0 or 1 ? Does this problem afflict the first expression? Why or why not? Put your answers in a PDF and submit it to complete the assignment