Question
Asked Nov 12, 2019
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Is the following series convergent or divergent? If it is convergent, find the sum. If it is divergent, explain
Σ(5)
TT
COS
(n1)2
COS
2
n=1
NAME OF SERIES TEST (S)
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Is the following series convergent or divergent? If it is convergent, find the sum. If it is divergent, explain Σ(5) TT COS (n1)2 COS 2 n=1 NAME OF SERIES TEST (S)

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Expert Answer

Step 1

Given,

Σ
- cos
cos
(n+ 1)
1
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Σ - cos cos (n+ 1) 1

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Step 2

Now,

-Σcos
Cos
(n+1)
Cos
cos
+1
n-1
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-Σcos Cos (n+1) Cos cos +1 n-1

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Step 3

Series divergence tes...

If lim a, 0, thena, is divergent
n
n1
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If lim a, 0, thena, is divergent n n1

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Tagged in

Math

Calculus

Limits