$\"\"$

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The equation is $\"\"$ .

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Consider $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ and $\"\"$ .

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Replace $\"\"$ in above values.

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$\"\"$ and $\"\"$ .

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Since $\"\"$ cannot be negative.

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Therefore, $\"\"$ .

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Property of natural logarithm: $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$ .