10. f(x, y) = x² + 2xy 11. fx, у) —D V56х? - 8у2 12. f(x, y) = 1 - Vr + y² 13. f(x, y) = x³ – y³ – 2xy + 6 14. f(x, y) = x³ + 3xy + y3 16x – 31 + 1 - &x 15. f(x, y) = 6x? – 2r3 + 3y? + 6xy 16. f(x, y) = x³ + y3 + 3x? – 3y² – 8 17. f(x, y) = x³ + 3xy² – 15x + y³ – 15y 18. f(x, y) = 2r³ + 2y³ – 9x² + 3y² 19. f(x, y) 3D 4ху — х4 — уч 20. f(x, y) = x* + y* + 4xy 12y

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
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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Find all the local maxima, local minima, and saddle points of the functions in Exercises 11-20.

10. f(x, y) = x² + 2xy
11. fx, у) —D V56х? - 8у2
12. f(x, y) = 1 - Vr + y²
13. f(x, y) = x³ – y³ – 2xy + 6
14. f(x, y) = x³ + 3xy + y3
16x – 31 + 1 - &x
15. f(x, y) = 6x? – 2r3 + 3y? + 6xy
16. f(x, y) = x³ + y3 + 3x? – 3y² – 8
17. f(x, y) = x³ + 3xy² – 15x + y³ – 15y
18. f(x, y) = 2r³ + 2y³ – 9x² + 3y²
19. f(x, y) 3D 4ху — х4 — уч
20. f(x, y) = x* + y* + 4xy
12y
Transcribed Image Text:10. f(x, y) = x² + 2xy 11. fx, у) —D V56х? - 8у2 12. f(x, y) = 1 - Vr + y² 13. f(x, y) = x³ – y³ – 2xy + 6 14. f(x, y) = x³ + 3xy + y3 16x – 31 + 1 - &x 15. f(x, y) = 6x? – 2r3 + 3y? + 6xy 16. f(x, y) = x³ + y3 + 3x? – 3y² – 8 17. f(x, y) = x³ + 3xy² – 15x + y³ – 15y 18. f(x, y) = 2r³ + 2y³ – 9x² + 3y² 19. f(x, y) 3D 4ху — х4 — уч 20. f(x, y) = x* + y* + 4xy 12y
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