Find the local extrema of the following function. f(x,y) = x³ - 3xy² +12y² For the critical points that do not fail the second-derivative test, determine whether these points are local maxima, lo minima, or saddle points. Select the correct choice below and fill in the answer box to complete your choice. (Type an ordered pair. Use a comma to separate answers as needed.) A. The function has (a) local minimum/minima at (x,y) = . B. The function has (a) local maximum/maxima at (x,y)= C. There is/are (a) saddle point(s) at (x,y)=¯. Does the second-derivative test for local extrema fail at any of the critical points? Select the correct choice below ar necessary, fill in the answer box to complete your choice. (Type an ordered pair. Use a comma to separate answers as needed.) O A. The second-derivative test for local extrema fails at (x,y)= B. The second-derivative test for local extrema does not fail for any of the critical points. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
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Find the local extrema of the following function.
f(x,y) = x³ - 3xy² +12y²
For the critical points that do not fail the second-derivative test, determine whether these points are local maxima, local
minima, or saddle points. Select the correct choice below and fill in the answer box to complete your choice.
(Type an ordered pair. Use a comma to separate answers as needed.)
O A. The function has (a) local minimum/minima at (x,y) =
B. The function has (a) local maximum/maxima at (x,y) = .
O c. There is/are (a) saddle point(s) at (x,y)=
Does the second-derivative test for local extrema fail at any of the critical points? Select the correct choice below and, if
necessary, fill in the answer box to complete your choice.
(Type an ordered pair. Use a comma to separate answers as needed.)
A. The second-derivative test for local extrema fails at (x,y) = .
B. The second-derivative test for local extrema does not fail for any of the critical points.
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
(Use a comma to separate answers as needed.)
A. The local maximum/maxima is/are
B. The local minimum/minima is/are
C. Since the second-derivative test for local extrema is inconclusive for some critical points, there may or may not
be local extrema.
Transcribed Image Text:Find the local extrema of the following function. f(x,y) = x³ - 3xy² +12y² For the critical points that do not fail the second-derivative test, determine whether these points are local maxima, local minima, or saddle points. Select the correct choice below and fill in the answer box to complete your choice. (Type an ordered pair. Use a comma to separate answers as needed.) O A. The function has (a) local minimum/minima at (x,y) = B. The function has (a) local maximum/maxima at (x,y) = . O c. There is/are (a) saddle point(s) at (x,y)= Does the second-derivative test for local extrema fail at any of the critical points? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Type an ordered pair. Use a comma to separate answers as needed.) A. The second-derivative test for local extrema fails at (x,y) = . B. The second-derivative test for local extrema does not fail for any of the critical points. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Use a comma to separate answers as needed.) A. The local maximum/maxima is/are B. The local minimum/minima is/are C. Since the second-derivative test for local extrema is inconclusive for some critical points, there may or may not be local extrema.
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