Can you conclude anything about ƒ(a, b) if ƒ and its first
Chapter 13, Problem 48E(choose chapter or problem)
Can you conclude anything about ƒ(a, b) if ƒ and its first and second partial derivatives are continuous throughout a disk centered at the critical point (a, b) and differ in sign? Give reasons for your answer.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer