Hi everyone. I have a question on one of my homework problems.
Q. Find the local max./min. values and the saddle point(s) of the function
So I started doing this problem and it was looking really messy so I went on cramster and got this:
so critical points are (0,0), (1,0), and (-1,0)
Therefore, f has a local minimum of 0 at (0,0) and saddle points at (1,0) and (-1,0).
The answer is correct but the work makes no sense. When computing , was completely neglected. should have been:
Same problem with
Is there something wrong with the solution or am I doing something wrong?
Thanks in advance!