$\"\"$

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The logarithmic value is $\"\"$ .

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Rewrite the logarithm as $\"\"$ .

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Quotient of logarithmic formula: $\"\"$ .

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$\"\"$ .

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Since $\"\"$ .

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$\"\"$

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Logarithmic property 10: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .