\"\"

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(a) The monotonic sequence is \"\".

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(b) A bounded increasing sequence is converges.

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(c) The sequence is \"\".

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(d) An unbounded sequence cannot converge.

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\"\"

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(a) The monotonic sequence is \"\".

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(b) A bounded increasing sequence is converges.

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(c) The sequence is \"\".

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(d) An unbounded sequence cannot converge.