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Multiple Choice
Rewrite the log expression as a difference of multiple logs. Further simplify if possible.
A
3−log5x
B
log5xlog5125
C
log5x−3
D
log5125log5x
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Verified step by step guidance
1
Start with the given logarithmic expression: \(\log_5\left(\frac{125}{x}\right)\).
Use the logarithm property that states \(\log_b\left(\frac{M}{N}\right) = \log_b M - \log_b N\) to rewrite the expression as \(\log_5 125 - \log_5 x\).
Recognize that 125 is a power of 5, since \$125 = 5^3$.
Apply the logarithm power rule: \(\log_b (a^k) = k \log_b a\), so \(\log_5 125 = \log_5 (5^3) = 3 \log_5 5\).
Since \(\log_5 5 = 1\), simplify \(3 \log_5 5\) to 3, giving the final simplified expression \(3 - \log_5 x\).