Let (sn) be a sequence with lim sup sn = 10 and lim inf sn = 5. (a) Show that (sn) is bounded. (b) Construct a sequence (sn) with lim sup sn = 10 and lim inf sn = 5 and with infinitely many subsequential limits. (It is redundant to say this but just to emphasize: you need to prove that your constructed sequence has infinitely many subsequential limits and that lim sup sn = 10 and lim inf sn = 5.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.3: Geometric Sequences
Problem 82E
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Let (sn) be a sequence with lim sup sn = 10 and lim inf sn = 5.
(a) Show that (sn) is bounded.
(b) Construct a sequence (sn) with lim sup sn = 10 and lim inf sn = 5 and with
infinitely many subsequential limits. (It is redundant to say this but just to
emphasize: you need to prove that your constructed sequence has infinitely
many subsequential limits and that lim sup sn = 10 and lim inf sn = 5.

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