The function f has continuous second derivatives, and a critical point at (-6, -3). Suppose fxx(−6, −3) = −6, fxy(−6, −3) = 9, fyy(−6, −3) = 5. Then the point (-6, -3): O A. cannot be determined OB. is a local maximum C. is a local minimum O D. is a saddle point O E. None of the above

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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E Q1 AND Q2

The function f has continuous second derivatives, and a critical point at (-6, -3). Suppose
fxx(−6, −3) = −6, fxy(−6, −3) = 9, fyy(−6, −3) = 5.
Then the point (-6, -3):
O A. cannot be determined
OB. is a local maximum
C. is a local minimum
O D. is a saddle point
O E. None of the above
Transcribed Image Text:The function f has continuous second derivatives, and a critical point at (-6, -3). Suppose fxx(−6, −3) = −6, fxy(−6, −3) = 9, fyy(−6, −3) = 5. Then the point (-6, -3): O A. cannot be determined OB. is a local maximum C. is a local minimum O D. is a saddle point O E. None of the above
The function f has continuous second derivatives, and a critical point at (10, 1). Suppose
fxx(10, 1) = 10, fry(10, 1) = −1, fyy(10, 1) = 9. Then the point (10, 1):
O A. is a local maximum
O B. is a local minimum
O C. is a saddle point
D. cannot be determined
O E. None of the above
Transcribed Image Text:The function f has continuous second derivatives, and a critical point at (10, 1). Suppose fxx(10, 1) = 10, fry(10, 1) = −1, fyy(10, 1) = 9. Then the point (10, 1): O A. is a local maximum O B. is a local minimum O C. is a saddle point D. cannot be determined O E. None of the above
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