$\"\"$

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The function is $\"\"$ .

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Apply Log Rule for Integration: $\"\"$ .

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$\"\"$

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$\"\"$

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Apply logarithm product rule: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Therefore, the function $\"\"$ is constant on interval $\"\"$ .

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$\"\"$

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The function $\"\"$ is constant on interval $\"\"$ .