13.3#1

Hi Professor, for problem one on section 13.3, I have the following answers:
a. N
b. N
c. 5xsin(y)+5y^2


I know they are all correct, but WebWork keeps saying that the variable "N" isn't allowed, even though it accepts it for Part b.


Please get back to me as soon as you can.
Thanks.*******************

The Webwork software has a random number generator that inputs slightly different parameters for each user; everybody gets to work a slightly different problem.  If you click the 'email instructor' button at the bottom of the page, webwork will send me a link to your specific problem and I can give you an answer specific to that problem.  That being said, I just worked the problem from my webwork account and there was just one "N", so I guess you may have computed the partial derivatives incorrectly when you decided that part a. was not conservative.