Identify base and argument: Identify the base and the argument of the logarithm.We are given the logarithm log16641. We need to evaluate this logarithm.
Express argument as power: Express the argument as a power of the base.We know that 64 is 26, and 16 is 24. Therefore, we can express 641 as (24)−23, since (24)23=26=64.
Apply change of base formula: Apply the change of base formula.Using the change of base formula, we can write log16(24)−23 as (log1624)⋅(−23).
Simplify expression: Simplify the expression.Since 16 is 24, log1624 is 1. Therefore, our expression simplifies to 1×(−23), which is −23.
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