$\"\"$

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The equation is $\"\"$ .

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For any real number b and for any positive integer n, $\"\"$ .

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$\"\"$

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$\"\"$ $\"\"$

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Apply power property of logarithm: $\"\"$ .

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$\"\"$

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$\"\"$

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Divide each side by $\"\"$ .

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$\"\"$

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$\"\"$ $\"\"$

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Using calculator: $\"\"$ .

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$\"\"$

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$\"\"$ (Divide: $\"\"$ )

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$\"\"$ $\"\"$

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Subtract $\"\"$ from each side.

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$\"\"$

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$\"\"$ (Take out common factor)

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ (Divide each side by 1.3692)

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$\"\"$ $\"\"$

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The value of $\"\"$ .