$\"\"$

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The series is $\"\"$ .

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$\"\"$ .

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(i)

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$\"\"$ .

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$\"\"$ .

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$\"\"$ .

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Substitute the corresponding values in $\"\"$ .

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$\"\"$ .

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Therefore, $\"\"$ .

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$\"\"$

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(ii)

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Prove that $\"\"$ .

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The series is $\"\"$ .

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$\"\"$ .

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$\"\"$ since $\"\"$ because $\"\"$ .

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Consider $\"\"$ .

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Apply the limits.

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$\"\"$

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$\"\"$

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$\"\"$ .

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Therefore, $\"\"$ .

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$\"\"$

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(i) $\"\"$ .

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(ii) $\"\"$ .