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If \(log_{y}\frac{1}{8}\) = 3, find the value of y.

Further Mathematics
WAEC 2017

If \(log_{y}\frac{1}{8}\) = 3, find the value of y.

  • A. -2
  • B. -\(\frac{1}{2}\)
  • C. \(\frac{1}{2}\)
  • D. 2
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Correct Answer: Option C
Explanation

\(log_{y}\frac{1}{8} = 3 \implies y^{3} = \frac{1}{8}\) (Laws of logarithm)

\(y^{3} = \frac{1}{2^{3}} = (\frac{1}{2})^{3}\)

Equating both sides, we have

\(y = \frac{1}{2}\)


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JAMB CBT Software 2024 - Free Download
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995