$\"\"$

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(a)

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The equation is $\"\"$ .

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Take natural logarithms on each side.

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$\"\"$ .

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Property of natural logarithms: $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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(b)

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The logarithmic equation is $\"\"$ .

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Property of natural logarithm : $\"\"$ if and only if $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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(a) $\"\"$ .

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(b) $\"\"$ .