WAEC - Mathematics (2020 - No. 4)
Express 1 + 2 log10\(^3\) in the form log10\(^9\)
log10\(^{90}\)
log10\(^{19}\)
log10\(^{9}\)
log10\(^{6}\)
คำอธิบาย
1 + 2log\(_{10}^3\)
= log\(_{10}^{10} + log_{10}^{3^2}\)
= log\(_{10}^{10} + log_{10}^{9}\)
= log\(_{10}^{10 \times 90}\) = log\(_{10}^{90}\)