Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Q3 full
Transcribed Image Text:utions to each of these problems on a seperate sheet of paper.
1. Consider the series
n=1
In(n)
n2
(a) Try using the Limit Comparison Test with b
(b) Try using the Limit Comparison Test with b
1
=
1221
1
Is the test conclusive? Explain your answer.
Ba
=. Is the test conclusive? Explain your answer.
(c) Try using the Limit Comparison Test with b
n
1
=
n3/2-
Is the test conclusive? Explain your
answer.
2. For each of the following series determine if they converge or diverge. You may use any test we have
covered so far.
(a)
3+ cos(n!)
玩
n=1
(b)²sin*(3/2)
n=1
(c) (-1)";
n=1
(3n)!
(n!)362n+1
(d) sin (+)
(e)
(f)
n=2
n=3
n=0
√n²-4
m³ +In(n)
2.5...(3n+2)
2nn!
(The expression in the numerator is called a running product. It is basically a factorial that skips
numbers rather than multiplying every number together. This one starts at 2 and skips by 3 each
time. So for instance, if n was 4 it would be 2.5.8.11.14.)
3. Let an and bn be two sequences of positive numbers such that bn diverges.
(a) If lim
An+1
(b) If lim
An
(c) If lim an
n7x
(d) If lim va
8012
=
=
1
1
2'
ེ
2'
=
1
1
2'
does an converge or diverge and what test justifies your conclusion?
does an converge or diverge and what test justifies your conclusion?
does an converge or diverge and what test justifies your conclusion?
2'
does an converge or diverge and what test justifies your conclusion?
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