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Evaluate each expression without using a calculator. $$\log _{2} \frac{1}{8}$$

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Step by step solution

01

Understand the logarithm and rearrange

Starting from the expression \( \log _{2} \frac{1}{8} \), the aim is to find an exponent that makes 2 to equal \(\frac{1}{8}\). We know that 2 to the power of -3 equals 1 over 8, because \(2^{-3} = \frac{1}{8}\) . Therefore, \( \log _{2} \frac{1}{8} = -3 \).

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