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Evaluate \(\log_{b} a^{n}\) if \(b = a^{\frac{1}{n}}\).

Mathematics
JAMB 1992

Evaluate \(\log_{b} a^{n}\) if \(b = a^{\frac{1}{n}}\).

  • A. n2
  • B. n
  • C. \(\frac{1}{n}\)
  • D. \(\frac{1}{n^2}\)
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Correct Answer: Option A
Explanation

Let \(\log_{b} a^{n} = x\)

\(\therefore a^{n} = b^{x}\)

\(a^{n} = (a^{\frac{1}{n}})^{x}\)

\(a^{n} = a^{\frac{x}{n}} \implies n = \frac{x}{n}\)

\(x = n^{2}\)


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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