College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter3: Functions
Section3.3: More On Functions; Piecewise-defined Functions
Problem 98E: Determine if the statemment is true or false. If the statement is false, then correct it and make it...
Related questions
Question
Number 20
![In Exercises 19-24, a function z =
f(x,y) and a polnt P are
given.
(a) Find the direction of maximal Increase offat P.
(b) What is the maximal value of D,fat P?
(c) Find the direction of minimal increase of f at P.
(d) Glve a direction U such that Drf= 0 at P.
Note: these are the same functions and points as in Exercises
19. f(x y) -xy + xy + xy, P= (2.1)
20. (x, y) = sin x cos y, P
4 3
1.
21. f(x. y) =
P (1,1).
22. (x.y)
-4x + 3y, P (5.4).
23. f(x.y) x + 2y-xy- 7x, P (4,1)
24. f(x y)xy 2x, P= (1.1)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F31ce1e8d-8f4e-4c20-90c6-11e9ea2fb3d1%2F10beac63-aa7b-4b09-86db-64017e5354c3%2F2ba165n_processed.jpeg&w=3840&q=75)
Transcribed Image Text:In Exercises 19-24, a function z =
f(x,y) and a polnt P are
given.
(a) Find the direction of maximal Increase offat P.
(b) What is the maximal value of D,fat P?
(c) Find the direction of minimal increase of f at P.
(d) Glve a direction U such that Drf= 0 at P.
Note: these are the same functions and points as in Exercises
19. f(x y) -xy + xy + xy, P= (2.1)
20. (x, y) = sin x cos y, P
4 3
1.
21. f(x. y) =
P (1,1).
22. (x.y)
-4x + 3y, P (5.4).
23. f(x.y) x + 2y-xy- 7x, P (4,1)
24. f(x y)xy 2x, P= (1.1)
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