Consider the series an +∞ and Etibn where cos(3) and bn 1 n³ n3 an =

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.3: Geometric Sequences
Problem 49E
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Consider the series an
+∞
n=1
and Etibn where
cos
(₁)
an =
and bn
1
n³
n3
Since a ≤ b, and Σ1b₁ diverges,
then 1 an diverges by the direct
comparison test
the above
Since an 2 b₁ and 1 b₁ converges,
then Σan converges by the direct
comparison test
the above
Transcribed Image Text:Consider the series an +∞ n=1 and Etibn where cos (₁) an = and bn 1 n³ n3 Since a ≤ b, and Σ1b₁ diverges, then 1 an diverges by the direct comparison test the above Since an 2 b₁ and 1 b₁ converges, then Σan converges by the direct comparison test the above
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