$\"\"$

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Find the area of integral $\"\"$ .

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Consider $\"\"$ hence $\"\"$ .

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$\"\"$

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If $\"\"$ then $\"\"$ .

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If $\"\"$ then $\"\"$ .

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Substitute all the above values in $\"\"$ .

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$\"\"$

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Intregration by part: $\"\"$ .

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$\"\"$ then $\"\"$

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$\"\"$ then $\"\"$

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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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$\"\"$

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$\"\"$

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$\"\"$ .