$\"\"$

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The series $\"\"$ .

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Consider the telescoping sum is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Find $\"\"$ .

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$\"\"$

\

$\"\"$

\

$\"\"$

\

Since $\"\"$ is not a real number, the series is divergent.

\

$\"\"$

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The series is divergent.