Express 1 + 2 log10\(^3\) in the form log10\(^9\)
MATHEMATICS
WAEC 2020
Express 1 + 2 log10\(^3\) in the form log10\(^9\)
- A. log10\(^{90}\)
- B. log10\(^{19}\)
- C. log10\(^{9}\)
- D. log10\(^{6}\)
Correct Answer: A. log10\(^{90}\)
Explanation
1 + 2log\(_{10}^3\)
= log\(_{10}^{10} + log_{10}^{3^2}\)
= log\(_{10}^{10} + log_{10}^{9}\)
= log\(_{10}^{10 \times 90}\) = log\(_{10}^{90}\)
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