$\"\"$

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The integral expression is $\"\"$ .

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Apply integral theorem :

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If $\"\"$ is integrable on $\"\"$ , then $\"\"$ .

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Where width $\"\"$ and $\"\"$ .

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The integral expression is $\"\"$ .

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$\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Apply summation formula $\"\"$ .

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$\"\"$

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As $\"\"$ , then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .