. For n = 0, 1, 2, 3,..., let an = (a) Find lim sup(an)¹/", lim inf(an)¹/", lim sup|ªn+¹| and lim inf | ªn+³|. (b) Do the series Σªn and Σ(-1)"ªn converge? (c) Consider the power series and with coefficients an as above. Find the radius of con- vergence and determine the exact interval of convergence for the series.

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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2. For n = 0, 1, 2, 3,...,
(a) Find lim sup(an)¹/", lim inf(an)¹/", lim sup|ªn+¹| and lim inf |ªn+1|
|ant1.
an
(b) Do the series an and Σ(-1)"an converge?
let
= (¹+2(-1)")".
an =
(c) Consider the power series and with coefficients an as above. Find the radius of con-
vergence and determine the exact interval of convergence for the series.
Transcribed Image Text:2. For n = 0, 1, 2, 3,..., (a) Find lim sup(an)¹/", lim inf(an)¹/", lim sup|ªn+¹| and lim inf |ªn+1| |ant1. an (b) Do the series an and Σ(-1)"an converge? let = (¹+2(-1)")". an = (c) Consider the power series and with coefficients an as above. Find the radius of con- vergence and determine the exact interval of convergence for the series.
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