The previous page is sending you to https://www.chegg.com/homework-help/questions-and-answers/let-f-g-h-functions-two-variables-differentiable-everywhere-z-f-x-y-x-g-u-v-y-h-u-v--u-0-v-q39771832.

 If you do not want to visit that page, you can return to the previous page.