$\"\"$

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(a).

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The equation is $\"\"$ .

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The logarithmic formula : $\"\"$ .

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$\"\"$

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Raise the power to the base $\"\"$ on both sides.

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$\"\"$

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The logarithmic formula : $\"\"$ .

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$\"\"$

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Add $\"\"$ to each side.

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$\"\"$

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$\"\"$

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$\"\"$ is undefined when $\"\"$ , Hence $\"\"$ is not a valid solution.

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Therefore, the value of $\"\"$ .

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$\"\"$

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(b).

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The equation is $\"\"$ .

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The quotient rule of logarithmic : $\"\"$ .

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$\"\"$

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Raise the power to the base $\"\"$ on both sides.

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$\"\"$

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$\"\"$

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The logarithmic formula : $\"\"$ .

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$\"\"$

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Multiply each side by $\"\"$ .

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$\"\"$

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The value of $\"\"$ .

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$\"\"$

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(a). The value of $\"\"$ .

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(b). The value of $\"\"$ .