$\"\"$

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The volume is $\"\"$ .

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Integration by parts formula : $\"\"$ .

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

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

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$\"\"$

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If the function $\"\"$ then its inverse is $\"\"$

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Since $\"\"$ and $\"\"$ are inverse function, then $\"\"$ .

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Observe the diagram $\"\"$ and $\"\"$ .

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

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$\"\"$

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

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$\"\"$ .

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Substitute the corresponding values in equation (1).

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$\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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

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

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$\"\"$

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Substitute the corresponding values in equation (3).

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$\"\"$

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Substitute equation (4) in equation (2).

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .