$\"\"$

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The function is $\"\"$ .

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Let $\"\"$ .

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Apply the derivative on each side.

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$\"\"$

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$\"\"$

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If $\"\"$

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If $\"\"$ .

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Substitute $\"\"$ and $\"\"$ 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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$\"\"$

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$\"\"$ .

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$\"\"$

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Graph the integrand, $\"\"$ .

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Graph :

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$\"\"$

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Observe the graph :

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The integral $\"\"$ is equal to $\"\"$ .

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$\"\"$

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$\"\"$ .