Exercises 1-3. Evaluate for 2:0s xS1,0sys3. de dy. e*** de dy. 1.

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cos ax
and cos 7x does not have an elementary antiderivative.
Finally, if 2, the region of integration, is neither of Type I nor of Type II, it may be
possible to break it up into a finite number of regions 21,..
Type I or Type II. (See Figure 17.3.12.) Since the double integral is additive,
2, each of which is of
f(x, y)dx dy +...+
f(x, y) dx dy =
f(x, y) dx dy.
Figure 17.3.12
Each of the integrals on the left can be evaluated by the methods of this section.
17.3 THE EVALUATION OF DOUBLE INTEGRALS BY REPEATED INTEGRALS I 887
EXERCISES 17.3
Exercises 1-3. Evaluate for 2 :0 s x < 1,0 s ys 3.
Exercises 19-24. Sketch the region 2 that gives rise to the re-
peated integral and change the order of integration.
x* dx dy.
e+ de dy
f(x, y) dy dx.
f(x, y) dx dy.
19.
21.
f(x, y)dx dy.
f(x. y)dy dx.
Exercises 4-6. Evaluate for 2:0sxs1,0sy s x.
23.
S(x, y) dy dx.
24.
fx. y)dy dr.
4.
Exercises 25-28. Calculate by double integration the area of the
bounded region determined by the curves.
25. x = 4y, 2y - x -4 = 0.
26. y -x, x- 4y - y.
28. x + y = 5, xy = 6.
Exercises 29-32. Sketch the region 2 that gives rise to the
repeated integral, change the order of integration, and then
evaluate.
6.
x*y* dx dy.
27. y =x, 4y-x.
Exercises 7-9. Evaluate the integral taking 2:0sxs fT,
0systr.
sin (x + y) dx dy.
cos (x + y) dxdy.
9.
+xy) dx dy.
Exercises 10-18. Evaluate the double integral.
30.
31.
+ 3y')dx dy. 2: 0sx² + y? < 1.
10.
dy dz.
|| JAy dx dy, a:0 s y s 1. y? sx s y.
11.
33. Find the area of the first quadrant region bounded by
xy = 2, y -1, y
34. Find the volume of the solid bounded above by z-x +y
and below by the triangular region with vertices (0, 0),
(0, 1). (1, 0).
35. Find the volume of the solid bounded by x +ty + = 1
and the coordinate planes.
yx+ 1.
|| ve' de dy. 2:0sys 1,0 sx s y.
12.
13.
2 the bounded region between
y= 2x und y = 8 – 2x.
36. Find the volume of the solid bounded above
the plane
2 the bounded region between
2 = 2x + 3y and below by the unit square
14.
y = x' and y = x,
0sx <1,
Osysi
37. Find the volume of the solid bounded above by z = x'y and
below by the triangular region with vertices (0, 0), (2, 0).
(0, 1).
15.
y)dx dy.
2 the region between y= x| and
y--Ixl, x € (-1, 1).
38. Find the volume under
paraboloid z-x²+ y within
·// * dx dy, a the triangular region bounded by the
the cylinder x + ys 1,z20.
16.
y-axis, 2y = x, y = 1.
39. Find the volume of the solid bounded above by the plane
2 = 2x +1 and below by the disk (x - 1) + y< 1.
40. Find the volume of the solid bounded above by z=
4 - y - r and below by the disk (y – 1 +x1.
41. Find the volume of the solid in the first octant (x 2 0,
y 2 0, z 2 0) boounded by z= + y, the plane
x+y = 1, and the coordinate planes.
· || " dx dy, 2 the triangular region bounded by the
17.
x-axis, 2y = x,x = 2.
J« + y)ds dy, 2 the region between y=x' and
y = x*.x € [-I, 1).
18.
42. Find the volume of the solid bounded by the circular cylinder
x* +y* = 1, the plane z = 0, and the plane x + = 1.
888 - CHAPTER 17 DOUBLE AND TRIPLE INTEGRALS
Transcribed Image Text:cos ax and cos 7x does not have an elementary antiderivative. Finally, if 2, the region of integration, is neither of Type I nor of Type II, it may be possible to break it up into a finite number of regions 21,.. Type I or Type II. (See Figure 17.3.12.) Since the double integral is additive, 2, each of which is of f(x, y)dx dy +...+ f(x, y) dx dy = f(x, y) dx dy. Figure 17.3.12 Each of the integrals on the left can be evaluated by the methods of this section. 17.3 THE EVALUATION OF DOUBLE INTEGRALS BY REPEATED INTEGRALS I 887 EXERCISES 17.3 Exercises 1-3. Evaluate for 2 :0 s x < 1,0 s ys 3. Exercises 19-24. Sketch the region 2 that gives rise to the re- peated integral and change the order of integration. x* dx dy. e+ de dy f(x, y) dy dx. f(x, y) dx dy. 19. 21. f(x, y)dx dy. f(x. y)dy dx. Exercises 4-6. Evaluate for 2:0sxs1,0sy s x. 23. S(x, y) dy dx. 24. fx. y)dy dr. 4. Exercises 25-28. Calculate by double integration the area of the bounded region determined by the curves. 25. x = 4y, 2y - x -4 = 0. 26. y -x, x- 4y - y. 28. x + y = 5, xy = 6. Exercises 29-32. Sketch the region 2 that gives rise to the repeated integral, change the order of integration, and then evaluate. 6. x*y* dx dy. 27. y =x, 4y-x. Exercises 7-9. Evaluate the integral taking 2:0sxs fT, 0systr. sin (x + y) dx dy. cos (x + y) dxdy. 9. +xy) dx dy. Exercises 10-18. Evaluate the double integral. 30. 31. + 3y')dx dy. 2: 0sx² + y? < 1. 10. dy dz. || JAy dx dy, a:0 s y s 1. y? sx s y. 11. 33. Find the area of the first quadrant region bounded by xy = 2, y -1, y 34. Find the volume of the solid bounded above by z-x +y and below by the triangular region with vertices (0, 0), (0, 1). (1, 0). 35. Find the volume of the solid bounded by x +ty + = 1 and the coordinate planes. yx+ 1. || ve' de dy. 2:0sys 1,0 sx s y. 12. 13. 2 the bounded region between y= 2x und y = 8 – 2x. 36. Find the volume of the solid bounded above the plane 2 the bounded region between 2 = 2x + 3y and below by the unit square 14. y = x' and y = x, 0sx <1, Osysi 37. Find the volume of the solid bounded above by z = x'y and below by the triangular region with vertices (0, 0), (2, 0). (0, 1). 15. y)dx dy. 2 the region between y= x| and y--Ixl, x € (-1, 1). 38. Find the volume under paraboloid z-x²+ y within ·// * dx dy, a the triangular region bounded by the the cylinder x + ys 1,z20. 16. y-axis, 2y = x, y = 1. 39. Find the volume of the solid bounded above by the plane 2 = 2x +1 and below by the disk (x - 1) + y< 1. 40. Find the volume of the solid bounded above by z= 4 - y - r and below by the disk (y – 1 +x1. 41. Find the volume of the solid in the first octant (x 2 0, y 2 0, z 2 0) boounded by z= + y, the plane x+y = 1, and the coordinate planes. · || " dx dy, 2 the triangular region bounded by the 17. x-axis, 2y = x,x = 2. J« + y)ds dy, 2 the region between y=x' and y = x*.x € [-I, 1). 18. 42. Find the volume of the solid bounded by the circular cylinder x* +y* = 1, the plane z = 0, and the plane x + = 1. 888 - CHAPTER 17 DOUBLE AND TRIPLE INTEGRALS
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