$\"\"$

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$\"\"$ is a positive number.

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$\"\"$

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Apply rule $\"\"$ .

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Therefore $\"\"$ .

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$\"\"$

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Apply exponent rule : $\"\"$ .

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$\"\"$ .

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$\"\"$

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Apply exponent rule : $\"\"$ .

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$\"\"$

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$\"\"$

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The correct answer is $\"\"$ .