Correct 1. For all n > 2, and the series 2 2= diverges, so by the Comparison Test, the series diverges. n In(n) n In(n) In(n) Incorrect v 2. For all n > 3, £= diverges, so by the Comparison Test, the series Σ In(n) diverges. and the series n n arctan(n) 1 converges, so by the Comparison Test, the series > arctan(n) Incorrect v 3. For all n > 2, and the series converges. n3 2n3 n3

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Each of the following statements is an attempt to show that a given series is convergent or divergent using the Comparison Test (NOT the Limit
Comparison Test). For each statement, enter Correct if the argument is valid, or enter Incorrect if any part of the argument is flawed. (Note: if the conclusion is true
but the argument that led to it was wrong, you must enter Incorrect.)
1
1. For all n > 2,
s= diverges, so by the Comparison Test, the series 2a In(2).
1
diverges.
Correct
and the series 2
n In(n)
n
In(n)
Incorrect v 2. For all n > 3,
1
and the series
>- diverges, so by the Comparison Test, the series
Σ
In(n)
diverges.
n
n
n
arctan(n)
arctan(n)
Incorrect v 3. For all n > 2,
and the series
2
converges, so by the Comparison Test, the series >
converges.
n³
2n3
n³
n3
1
and the series
n2
n
4. For all n > 2,
7
Σ
n2
Correct
converges, so by the Comparison Test, the series >
converges.
n3
7 - n3
n
5. For all n > 3,
n³
and the series 2
n2
converges, so by the Comparison Test, the series )
n2
Correct
n3
converges.
1
1
1
6. For all n > 3,
n2
1
and the series
n2
1
1
> converges, so by the Comparison Test, the series )
n²
Correct
converges.
6
n2
>
Transcribed Image Text:Each of the following statements is an attempt to show that a given series is convergent or divergent using the Comparison Test (NOT the Limit Comparison Test). For each statement, enter Correct if the argument is valid, or enter Incorrect if any part of the argument is flawed. (Note: if the conclusion is true but the argument that led to it was wrong, you must enter Incorrect.) 1 1. For all n > 2, s= diverges, so by the Comparison Test, the series 2a In(2). 1 diverges. Correct and the series 2 n In(n) n In(n) Incorrect v 2. For all n > 3, 1 and the series >- diverges, so by the Comparison Test, the series Σ In(n) diverges. n n n arctan(n) arctan(n) Incorrect v 3. For all n > 2, and the series 2 converges, so by the Comparison Test, the series > converges. n³ 2n3 n³ n3 1 and the series n2 n 4. For all n > 2, 7 Σ n2 Correct converges, so by the Comparison Test, the series > converges. n3 7 - n3 n 5. For all n > 3, n³ and the series 2 n2 converges, so by the Comparison Test, the series ) n2 Correct n3 converges. 1 1 1 6. For all n > 3, n2 1 and the series n2 1 1 > converges, so by the Comparison Test, the series ) n² Correct converges. 6 n2 >
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Follow-up Question
4. For all n> 1,<. and the series
5. For all n > 1. nin(n) <2, and the series 2 Σ
arctan(n)
273, and the series
6. For all n > 1,
n³
converges, so by the Comparison Test, the series
converges.
diverges, so by the Comparison Test, the series nin(n) diverges.
converges, so by the Comparison Test, the series
arctan(n)
n³
converges.
Transcribed Image Text:4. For all n> 1,<. and the series 5. For all n > 1. nin(n) <2, and the series 2 Σ arctan(n) 273, and the series 6. For all n > 1, n³ converges, so by the Comparison Test, the series converges. diverges, so by the Comparison Test, the series nin(n) diverges. converges, so by the Comparison Test, the series arctan(n) n³ converges.
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Follow-up Question
Each of the following statements is an attempt to show that a given series is convergent or divergent using the Comparison Test (NOT the Limit
Comparison Test.) For each statement, enter C (for "correct") if the argument is valid, or enter I (for "incorrect") if any part of the argument is
flawed. (Note: if the conclusion is true but the argument that led to it was wrong, you must enter I.) Note: you only have 3 tries for this problem.
K
1. For all n > 2,
>, and the series Σ.diverges, so by the Comparison Test, the series >
n'
L
2. For all n > 2,¹ < and the series
3. For all n > 1, (n) <s, and the series
1
I
1
1
I
C
In(n)
n
4. For all n> 1,<, and the series
5. For all n > 1. nln(n) <2, and the series 2 Σ
6. For all n > 1,
arctan(n)
n³
<2, and the series
In(n)
n
diverges.
converges, so by the Comparison Test, the series Σ²-4 converges.
T
converges, so by the Comparison Test, the series
converges.
converges, so by the Comparison Test, the series
converges.
diverges, so by the Comparison Test, the series ΣIn(n) diverges.
converges, so by the Comparison Test, the series
arctan(n)
n³
converges.
Transcribed Image Text:Each of the following statements is an attempt to show that a given series is convergent or divergent using the Comparison Test (NOT the Limit Comparison Test.) For each statement, enter C (for "correct") if the argument is valid, or enter I (for "incorrect") if any part of the argument is flawed. (Note: if the conclusion is true but the argument that led to it was wrong, you must enter I.) Note: you only have 3 tries for this problem. K 1. For all n > 2, >, and the series Σ.diverges, so by the Comparison Test, the series > n' L 2. For all n > 2,¹ < and the series 3. For all n > 1, (n) <s, and the series 1 I 1 1 I C In(n) n 4. For all n> 1,<, and the series 5. For all n > 1. nln(n) <2, and the series 2 Σ 6. For all n > 1, arctan(n) n³ <2, and the series In(n) n diverges. converges, so by the Comparison Test, the series Σ²-4 converges. T converges, so by the Comparison Test, the series converges. converges, so by the Comparison Test, the series converges. diverges, so by the Comparison Test, the series ΣIn(n) diverges. converges, so by the Comparison Test, the series arctan(n) n³ converges.
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