$\"\"$

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The integral is $\"\"$ .

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Consider $\"\"$ .

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Let $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute corresponding values in above integral.

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$\"\"$

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Substitute $\"\"$ in the above equation.

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$\"\"$

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$\"\"$ .

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$\"\"$

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The improper integral $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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The improper integral $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Thus, $\"\"$ .

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$\"\"$

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$\"\"$ .