10. log₈₁8

log₈₁8 = log(3⁴)2³ = \(\frac{3}{4}\)log₃3/log₃3 = \(\frac{3}{4}\).
log₈₁8 = log(3⁴)(2³) = \(\frac{3}{4}\) * log₃3/log₃2 = \(\frac{3}{4}\)
Ответ: 3/4 = 0.75