$\"\"$

The function is $\"\"$ .

Take logarithm of each side.

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

$\"\"$

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

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

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Property of lograithm : $\"\"$ .

$\"\"$

Apply logarithmic differentiation on each side with respect $\"\"$ .

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Substitute $\"\"$ in the expression.

$\"\"$ .

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$\"\"$ .