Math 143: Calculus III Midterm I Practice Exam
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Math 143: Calculus III
Midterm I Practice Exam
October 4th, 2022
1. (10 points) Determine whether the following sequences converge or diverge. If they converge, find their limit. If they diverge, state whether they diverge to +● , -● or because they oscillate. Justify and show all your work.
(a)
an = (-1)nn2
(b)
an =
n |
ln(n) |
2. (10 points) Determine whether the following sequences converge or diverge. If they converge, find their limit. If they diverge, state whether they diverge to +● , -● or because they oscillate. Justify and show all your work.
(a)
an =
n5n |
32n |
(b)
an =
3. (10 points) Consider the telescoping series
_ _
an =
n=1 n=1
(a) Find the first three partial sums.
s1 =
s2 =
s3 =
k
(b) Find a formula for the kth partial sum sk =
n=1
_
(c) Determine whether an converges or diverges. If it converges, find its sum.
n=1
4. (10 points) Use the integral test to determine whether the following series converges or diverges. To get full credit you must use the integral test.
_
6n2 e一n3
n=1
5. (10 points) Determine whether the following series converges or diverges. If it converges,
find its sum. Justify and show all your work. Name any test you are using.
_
22n71一n
n=0
6. (10 points) Determine whether the following series converges or diverges. If it converges, find its sum. Justify and show all your work. Name any test you are using.
_
(1.1)n
n=1
7. (10 points) Determine whether the following series converges or diverges. Justify and show all your work. Name any test you are using.
_
arctan(n)
n=1
8. (10 points) Determine whether the following series converge or diverge. Justify and show all your work. Name any test you are using.
_ ^n - n
2
9. (10 points) Determine whether the following series converge or diverge. Justify and show all your work. Name any test you are using.
_ 6n - 5n
7n + n2
n=1
10. (10 points) Determine whether the following series converges or diverges. Justify and show all your work. Name any test you are using.
_ ln(6n)
2
2022-09-28