$\"\"$

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The function is $\"\"$ .

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Take logarithm of each side.

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Power property of logarithms : $\"\"$ .

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$\"\"$ .

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Apply derivative on each side with respect $\"\"$ .

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$\"\"$

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Product rule of derivative: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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