$\"\"$

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The integral is $\"\"$ .

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Let $\"\"$ , then $\"\"$ .

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

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Substitute corresponding values in $\"\"$ .

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$\"\"$

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$\"\"$

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Consider $\"\"$ .

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Partial fractions decomposition of the function :

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$\"\"$

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Substitute $\"\"$ in above equation.

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$\"\"$

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Compare $\"\"$ coefficients on each side.

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$\"\"$ .

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Compare constant terms on each side.

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$\"\"$ .

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Substitute $\"\"$ in above equation.

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$\"\"$ .

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Substitute the values of $\"\"$ , $\"\"$ and $\"\"$ in the equation (1).

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$\"\"$ .

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$\"\"$

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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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$\"\"$ .