Suppose (1,1) is a critical point of f and fxx(1,1) = 4, fxy(1,1) = 6 , fyy(1,1) = 2.  What can you conclude from the choices below? Please show the working.   A. (1,1) is a saddle point of f (x,y). B. (1,1) is a local maximum of f (x,y). C. (1,1) is a local minimum of f (x,y)

Calculus: Early Transcendentals
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ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Suppose (1,1) is a critical point of f and fxx(1,1) = 4, fxy(1,1) = 6 , fyy(1,1) = 2.  What can you conclude from the choices below? Please show the working.

 

A. (1,1) is a saddle point of f (x,y).

B. (1,1) is a local maximum of f (x,y).

C. (1,1) is a local minimum of f (x,y).

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