Change all log to base 10 (lg). Use the change of base formula.

Use the formula log_{a}b^{c}= c log_{a}b. Simplify the expression.

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Normally student will change the expression to the same base number. But it will be difficuil for the bove question. A better solution is to change all to base 10 (lg), the cancel out the common logs. You may also change to ln (log_{e}) instead of lg., the answer will still be the same.

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