Nilai dari 81log9 + 25log125 - 16log8 adalah

[tex] {}^{81} log \: 9 + {}^{25} log \: 125 - {}^{16} log \: 8 \\ \\ = {}^{ {9}^{2} } log \: 9 + { {}^{5} }^{2} log {5}^{3} - {}^{ {2}^{4} } log \: {2}^{3} \\ \\ = \frac{1}{2} \: \: \: {}^{9} log \: 9 + \frac{3}{2} \: \: {}^{5} log \: 5 - \frac{3}{4} \: \: \: {}^{2} log \: 2 \\ \\ = \frac{1}{2} (1) + \frac{3}{2} (1) - \frac{3}{4} (1) \\ \\ = \frac{1}{2} + \frac{3}{2} - \frac{3}{4} \\ \\ = \frac{2 + 6 - 3}{4} \\ = \frac{5}{4} [/tex]