Deck 13: Section 9: Functions of Several Variables
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Deck 13: Section 9: Functions of Several Variables
1
Examine the function
for relative extrema and saddle points. 
A) relative minimum:
B) relative minimum:
C) relative maximum:
D) saddle point:
E) saddle point:


A) relative minimum:

B) relative minimum:

C) relative maximum:

D) saddle point:

E) saddle point:

saddle point: 

2
Find the critical points of the function
, and from the form of the function, determine whether a relative maximum or a relative minimum occurs at each point.
A) relative maxima at
,
,
, where
are arbitrary real numbers
B) relative minima at
,
,
, where
are arbitrary real numbers
C) relative minimum at
D) relative maximum at
E) no relative extrema

A) relative maxima at




B) relative minima at




C) relative minimum at

D) relative maximum at

E) no relative extrema
relative maxima at
,
,
, where
are arbitrary real numbers




3
Examine the function
for relative extrema and saddle points.
A) saddle point:
B) relative minimum:
C) relative minimum:
D) saddle point:
E) saddle point:

A) saddle point:

B) relative minimum:

C) relative minimum:

D) saddle point:

E) saddle point:

saddle point: 

4
Examine the function
for relative extrema and saddle points. 
A) saddle point:
B) relative minimum:
C) relative maximum:
D) relative minimum:
E) no critical points


A) saddle point:

B) relative minimum:

C) relative maximum:

D) relative minimum:

E) no critical points
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5
Find the critical points of the function
, and from the form of the function, determine whether a relative maximum or a relative minimum occurs at each point.
A) relative minimum at
B) relative maximum at
C) relative maximum at
D) relative minimum at
E) no relative extrema

A) relative minimum at

B) relative maximum at

C) relative maximum at

D) relative minimum at

E) no relative extrema
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6
Examine the function
for relative extrema.
A) relative minimum:
B) relative minimum:
C) relative maximum:
D) relative maximum:
E) no relative extrema

A) relative minimum:

B) relative minimum:

C) relative maximum:

D) relative maximum:

E) no relative extrema
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7
List the critical points of the function
for which the Second Partial Test fails.
A) Test fails at
and
.
B) Test fails only at
.
C) Test fails at
.
D) Test fails at
.
E) Test fails only at
.

A) Test fails at


B) Test fails only at

C) Test fails at

D) Test fails at

E) Test fails only at

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8
Examine the function
for relative extrema.
A) relative maximum:
B) relative minimum:
C) relative maximum:
D) relative minimum:
E) no relative extrema

A) relative maximum:

B) relative minimum:

C) relative maximum:

D) relative minimum:

E) no relative extrema
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9
Identify any extrema of the function
by recognizing its given form or its form after completing the square.
A) relative maximum:
B) relative minimum:
C) relative minimum:
D) relative maximum:
E) relative maximum:

A) relative maximum:

B) relative minimum:

C) relative minimum:

D) relative maximum:

E) relative maximum:

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10
Find the absolute extrema of
on the region bounded by the square with vertices 
A) absolute minimum:
Absolute maximum:
B) absolute minimum:
Absolute maximum:
C) absolute minimum:
Absolute maximum:
D) absolute minimum:
Absolute maximum:
E) absolute minimum:
Absolute maximum:


A) absolute minimum:

Absolute maximum:

B) absolute minimum:

Absolute maximum:

C) absolute minimum:

Absolute maximum:

D) absolute minimum:

Absolute maximum:

E) absolute minimum:

Absolute maximum:

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11
Examine the function
for relative extrema.
A) relative minimum:
B) relative maximum:
C) relative maximum:
D) relative maximum:
E) relative minimum:

A) relative minimum:

B) relative maximum:

C) relative maximum:

D) relative maximum:

E) relative minimum:

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12
Identify any extrema of the function
by recognizing its given form or its form after completing the square.
A) relative maximum:
B) relative maximum:
C) relative minimum:
D) relative minimum:
E) relative maximum:

A) relative maximum:

B) relative maximum:

C) relative minimum:

D) relative minimum:

E) relative maximum:

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13
Examine the function
for relative extrema.
A) relative minimum:
B) relative maximum:
C) relative minimum:
D) relative minimum:
E) relative maximum:

A) relative minimum:

B) relative maximum:

C) relative minimum:

D) relative minimum:

E) relative maximum:

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14
Find the absolute extrema of
on the region
.
A) absolute minimum:
Absolute maximum:
B) absolute minimum:
Absolute maximum:
C) absolute minimum:
Absolute maximum:
D) absolute minimum:
Absolute maximum:
E) absolute minimum:
Absolute maximum:


A) absolute minimum:

Absolute maximum:

B) absolute minimum:

Absolute maximum:

C) absolute minimum:

Absolute maximum:

D) absolute minimum:

Absolute maximum:

E) absolute minimum:

Absolute maximum:

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15
Find the absolute extrema of the function
over the triangular region in the xy-plane with vertices
.
A) absolute maximum:
at 
Absolute minimum:
at
and along the line 
B) absolute maximum:
at 
Absolute minimum:
at
and along the line 
C) absolute maximum:
at 
Absolute minimum:
at
and along the line 
D) absolute maximum:
at 
Absolute minimum:
at 
E) absolute maximum:
at 
Absolute minimum:
at 


A) absolute maximum:


Absolute minimum:



B) absolute maximum:


Absolute minimum:



C) absolute maximum:


Absolute minimum:



D) absolute maximum:


Absolute minimum:


E) absolute maximum:


Absolute minimum:


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16
Determine whether there is a relative maximum, a relative minimum, a saddle point, or insufficient information to determine the nature of the function
at the critical point
, if
.
A) relative maximum
B) relative minimum
C) saddle point
D) insufficient information



A) relative maximum
B) relative minimum
C) saddle point
D) insufficient information
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17
Examine the function
for relative extrema and saddle points.
A) saddle point:
; relative minimum: 
B) saddle point:
; relative minimum: 
C) relative minimum:
; relative maximum: 
D) relative minimum:
; relative maximum: 
E) saddle points:
, 

A) saddle point:


B) saddle point:


C) relative minimum:


D) relative minimum:


E) saddle points:


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