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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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Math 232
June 30, 2005
Name
(โx^2 โy^2 ) , f (x, y) = x
3 โ sin (y) and
f (x, y) = x
2
2
(^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^ -
1
0
2
4
y
0
2 (^1 2 )
3
3
(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 = โ1 and sketch the graph on the following axes.
1
2
3
4
5
-5 -4 -3 -2 -1 1 2 3 4 5
v = ใ 2 , โ 1 , 3 ใ and
w = ใ 0 , โ 1 , 1 ใ. Find each of the following quantities.
(a)
v +
w
(b) (
v ยท
w )
w
(c) 3
v โ 2
w
(d) (
v + 4
w ) ร
v
that plane.
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?