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Math 232 Exam Solutions: Graphing, Cross-Sections, Linear Functions, Vectors, Contour Plot, Exams of Advanced Calculus

Solutions to exam 1 for math 232, including matching equations to their corresponding graphs, finding cross-sections of functions, determining a linear function's value given specific x and y coordinates, discovering a formula for a function with spherical level surfaces, describing level surfaces, calculating vector quantities, finding the normal vector to a plane, determining the angle between two planes, and identifying the function that produces a given contour plot.

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Pre 2010

Uploaded on 08/16/2009

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EXAM 1
Math 232
June 30, 2005
Name
1. Match the equations f(x, y) = x+yโˆ’1, f(x, y) = โˆ’e(โˆ’x2
โˆ’y2),f(x, y) = x3โˆ’sin (y) and
f(x, y) = x2+y2+ 4 to the correct graphs below.
-4
-2
0y
2
4
10
2
x
20
04
-2
30
-4
40
50
-3
-2
-1
0y
1
32
2
x
1
-20
0-1 -2
-10
3
-3
0
10
20
-3
-2
-1
-3 -1
-2
-0.8
0
-1 x
-0.6
01
y
-0.4
12
2
-0.2
3
3
0
-3
-2
-1
0x
-3
-6
-4
-2
1
-2
0
2
-1
4
y
02
1233
pf3
pf4
pf5

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Download Math 232 Exam Solutions: Graphing, Cross-Sections, Linear Functions, Vectors, Contour Plot and more Exams Advanced Calculus in PDF only on Docsity!

EXAM 1

Math 232

June 30, 2005

Name

  1. Match the equations f (x, y) = x + y โˆ’ 1, f (x, y) = โˆ’e

(โˆ’x^2 โˆ’y^2 ) , f (x, y) = x

3 โˆ’ sin (y) and

f (x, y) = x

2

  • y

2

  • 4 to the correct graphs below.

(^0) y 2

4

10

2

x

20

0

4

30

40

50

(^0) y

1

3

2 2

x

1

(^0) -

3

0

10

20

-1^ - -3 (^) -

-0.

-1 0 x

-0.

(^0 ) y

-0.

1 2 2

-0.

3 3

0

-2^ -

(^0) x

1

0

2

4

y

0

2 (^1 2 )

3

  1. Let f (x, y) = y

3

  • xy.

(a) Find the cross-section of f for x = 1 and sketch the graph on the following axes.

1

2

3

4

5

-5 -4 -3 -2 -1 1 2 3 4 5

(b) Find the cross-section of f for y = โˆ’1 and sketch the graph on the following axes.

1

2

3

4

5

-5 -4 -3 -2 -1 1 2 3 4 5

  1. Let

v = ใ€ˆ 2 , โˆ’ 1 , 3 ใ€‰ and

w = ใ€ˆ 0 , โˆ’ 1 , 1 ใ€‰. Find each of the following quantities.

(a)

v +

w

(b) (

v ยท

w )

w

(c) 3

v โˆ’ 2

w

(d) (

v + 4

w ) ร—

v

  1. The three points (1, 0 , โˆ’1), (โˆ’ 1 , 0 , 0) and (2, 1 , 1) define a plane. Find the vector normal to

that plane.

  1. What is the angle between the two planes 5(xโˆ’1)+3(y+2)+2z = 0 and x+3(yโˆ’1)+2(z+4) =
  1. A boat is heading east at 25 km/hr (relative to the water). the current is moving southeast

at 10 km/hr. What is the vector that represents that actual movement of the boat? By what

angle does the current push the boat off of its due east course?