Question
Asked Apr 26, 2019
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Determine whether the series is convergent or divergent and state what test is being used.

[summation sign from n=0 to infinity] (-1)ncos(n)/n2

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Expert Answer

Step 1

Given:

The series is 

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Step 2

Known fact:

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Step 3

Calculation:

Let us check the convergence as follows.

Since removing or adding a term in a series does not ...

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