By considering different paths of approach, show that the function below has no limit as (x,y)-(0,0). f(x,y) =- x* + y?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter4: Calculating The Derivative
Section4.2: Derivatives Of Products And Quotients
Problem 35E
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By considering different paths of approach, show that the function below has no limit as (x,y)→(0,0).
f(х,у) -
Examine the values of f along curves that end at (0,0). Along which set of curves is fa constant value?
O A. y=kx, x#0
O B. y= kx + kx?,x#0
O c. y= kx³, x+0
O D. y= kx?, x+0
If (x,y) approaches (0,0) along the curve when k =1 used in the set of curves found above, what is the limit?
(Simplify your answer.)
If (x,y) approaches (0,0) along the curve when k = 0 used in the set of curves found above, what is the limit?
(Simplify your answer.)
What can you conclude?
O A. Since f has two different limits along two different paths to (0,0), by the two-path test, f has no limit as (x,y) approaches (0,0).
O B. Since f has the same limit along two different paths to (0,0), by the two-path test, f has no limit as (x,y) approaches (0,0).
O C. Since f has two different limits along two different paths to (0,0), in cannot be determined whether or not f has a limit as (x,y) approaches (0,0).
O D. Since f has the same limit along two different paths to (0,0), in cannot be determined whether or not f has a limit as (x,y) approaches (0,0).
Transcribed Image Text:12 By considering different paths of approach, show that the function below has no limit as (x,y)→(0,0). f(х,у) - Examine the values of f along curves that end at (0,0). Along which set of curves is fa constant value? O A. y=kx, x#0 O B. y= kx + kx?,x#0 O c. y= kx³, x+0 O D. y= kx?, x+0 If (x,y) approaches (0,0) along the curve when k =1 used in the set of curves found above, what is the limit? (Simplify your answer.) If (x,y) approaches (0,0) along the curve when k = 0 used in the set of curves found above, what is the limit? (Simplify your answer.) What can you conclude? O A. Since f has two different limits along two different paths to (0,0), by the two-path test, f has no limit as (x,y) approaches (0,0). O B. Since f has the same limit along two different paths to (0,0), by the two-path test, f has no limit as (x,y) approaches (0,0). O C. Since f has two different limits along two different paths to (0,0), in cannot be determined whether or not f has a limit as (x,y) approaches (0,0). O D. Since f has the same limit along two different paths to (0,0), in cannot be determined whether or not f has a limit as (x,y) approaches (0,0).
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