(1) Suppose a sequence a, converges. Then the series an converges, (H) Suppose that a,, s b, and we know the serles b, converges. Then a, converges. (iit) Suppose the partinl sum sequence of a series is given by SN Then the series converges.

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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Question 1
(a) For cach statement, answer true or false. If the answer is true, give some justification. If the
answer is false, give a counter example.
(1) Suppose a sequonce a, converges. Then the series an converges.
(ii) Suppose that an < b, and we know the serles b, converges, Then a, converges.
(iit) Suppose the partinl sum sequence of a series is given by SN
Then the series converges.
%3D
(iv) Suppose that a, 2 0 and a, converges. Then
a, converges.
(v) Suppose the sequence b, converges and the series)
an has partial sum sequence Sy such that.
OS SN S bN. Then the series
an converges.
[10)
n2"
(b) Let an
Does the series an convergo or diverge? Prove your claim .
(10)
3"
cos(n)
na -1
(c) Let an
whore n 2 2. Prove the the limit of a, turns to 0 as n turns to co.
(5)
Transcribed Image Text:Question 1 (a) For cach statement, answer true or false. If the answer is true, give some justification. If the answer is false, give a counter example. (1) Suppose a sequonce a, converges. Then the series an converges. (ii) Suppose that an < b, and we know the serles b, converges, Then a, converges. (iit) Suppose the partinl sum sequence of a series is given by SN Then the series converges. %3D (iv) Suppose that a, 2 0 and a, converges. Then a, converges. (v) Suppose the sequence b, converges and the series) an has partial sum sequence Sy such that. OS SN S bN. Then the series an converges. [10) n2" (b) Let an Does the series an convergo or diverge? Prove your claim . (10) 3" cos(n) na -1 (c) Let an whore n 2 2. Prove the the limit of a, turns to 0 as n turns to co. (5)
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