3) \ \

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Step 1: \ \

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The sequence is \"\".

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\"\" has the following partial sums.

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 \"\" \ \

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\"\"

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\"\"

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.

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.

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\"\".

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Find the limit of \"\".

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\"\"

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\"\" \ \

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\"\"

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\"\"

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\"\"

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Because the limit of \"\" is \"\", the sequence converges.

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Solution: \ \

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The sequence converges and its sum is \"\". \ \