MATH 152, Fall 2013
Week In Review
Week 15
e
Z
1. Evaluate
1
(lnx)1/3
dx.
x
2. Compute the area enclosed by the parabola y 2 = 3x + 4 and the straight line y = x
3. Find
Z
4. Find
Z
9
4
√
1
( x + √ )2 dx.
x
2
1
2x
dx.
2x + 4
5. Suppose it is given f (5) = 4, f 0 (5) = 3, f (1) = 5, and f 0 (1) = −2. Compute
R5
6. Find the volume generated by rotating the region bounded by y =
x-axis.
y = 0, x = 0, and x = 1 about the
7. If g(x) =
Z
5x
√ 1
,
x2 +1
1
xf 00 (x)dx.
cos(t2 ) dt, then nd g 0 (x).
cos(x)
8. Find the integral
R
x5 ex dx.
2
9. Let f be a continuos function satisfying that its average value on the interval[0, t] is equal to tan(t) + t. Find
the function f
10. Find the area bounded by the curves x + y 2 = 2 and x + y = 0.
11. Find the volume of the described solid S . The base of S is the triangular region with vertices (0, 0),(2, 0), and
(0, 1). Cross-sections perpendicular to the x-axis are equilateral triangles.
12. A tank, of semispherical shape with radius equal to 5f t, is full of water
Find the work required to pump the water out of the outlet. Use the fact that the water weighs 62.5 lb/f t3 .
√
13. Let R denote the region enclosed by the x-axis, the line x = 1, and the curve y = x. Use the method of
cylindrical shells to calculate the volume of the solid obtained by rotating the region R about the line x = 1.
14. Find the indenite integral
Z √
x2 − 4
dx.
x
15. For which values of the xed positive number p does the improper integral
Z
e
0
16. Given the sequence {an } = {ln(7 + 5n2 ) − ln(3n2 + 5)}. Compute limn→∞ an .
17. Find
Z
xln(x)dx.
dx
converges ?
x(lnx)p
18. Find the integral
Z
x2
dx.
x+3
19. The recursive sequence dened by a1 = 2 and an+1 = 5 −
∞
Z
√
1
22. Find the
23. Find the
24. Find the
25. Find
Z
26. Find
Z
27. Find
Z
1
1
dx converges or not.
+1
√
length of the curve y = x3 from the point (0, 0) to (4, 8).
Z
1
dx with a 6= 0.
integral
2
x − 25
√
area of the surface obtained by rotating the curve y = x with 9 ≤ x ≤ 25 about the x-axis.
Z
integral sin5 (x)cos4 (x)dx.
20. Determine if the integral
21. Find the
4
for n ≥ 1 converges. Find the limit.
an
√
x3
x7
dx.
x4 + 1
x+8
dx.
x3 + 4x
∞
ln(x)
dx.
x2
28. Given the curve x = cost + tsint , y = sint − tcost , 0 ≤ t ≤ π2 . SET UP BUT DO NOT EVALUATE an integral
to nd the area of the surface obtained by rotating the curve about the y-axis.
29. Consider the innite series
∞
X
(−1)n
n=1
n
. Determine if it is convergent or not.
n+1
30. Compute the sum of the innite series
31. Is the series
∞
X
(−1)n+1
n=1
∞
X
1
(n + 2)(n + 3)
n=1
.
1
absolutely convergent ?
n5/2
32. Which of the following is the Maclaurin series expansion of the given function f (x) = cos2 (x2 ).
33. Find the unit vector in the direction of b − a where a =< 0, 2, 1 > and b =< 1, 1, 3 >.
34. Given the triangle with vertices A(2, −2, 5), B(1, 1, 4), and C(3, 1, 3). Find the cosine of the angle at B .
35. Find a power representation for the function f (x) =
x2
and determine the interval of convergence.
9 − x2
36. A constant force with vector representation F = 10î + 18ĵ − 6k̂ moves an object along a straight line from
the point A(2, 3, 0) to the point B(4, 9, 15). Find the work done if the distance is measured in meters and the
magnitude of the force is measured in Newtons.
37. Find the sum of the series
∞
X
(−1)n
n=0
38. Evaluate the integral
Z
π 2n−1
.
62n+1 (2n)!
sinx
dx as an innite series.
x
39. Find the sum of the series
∞
X
5−3n+1 42n+1 .
n=0
40. Consider the following series
∞
X
n=1
sin(
1
). Determine if the series is convergent.
n2
41. Determine radius and interval of convergence for the series
∞
X
(−3)n
n=1
42. Does the series
∞
X
(−1)n+1
n=2
(x + 5)n
.
n
1
converge? Does it converge absolutely ?
nln5 (n)
43. Find a series expansion for the function f (x) =
1
.
(4 + x)2
44. The vertices of a triangle are A(2, 4, 5), B(3, 5, 3), and C(2, 8, −3). Let a be the vector from A to B , b be the
vector from A to C , and p the vector projection of a onto b
(a) Find a, b, and p
(b) Find the vector a − p and interpret. What is the distance from the point B to the line segment joining the
points A and C ?
45. Using the properties of the cross product, nd
axb
46. Find the cosine of the angle between the vectors
47. Evaluate the integral
Z
if
a=i+j+k
a = i + j + 2k
and
and
b = i + j − k.
b = 2j − 3k
3
ex dx as an innite series.
48. Find the Maclaurin series expansion of the function f (x) = tan−1 (x2 ).
49. Find the sum
∞
X
(−1)n x2n+1 2n
.
2n + 1
n=0
50. Find the sum
∞
X
(−1)n xn+2
.
(n + 1)!
n=1
51. Given the points A = (1, 0, 1), B = (1, 1, 1) and C = (1, 6, a), determine for what values of a the three poitns
are collinear.