Вариант 1. 16. log_3(18) / (2 + log_3(2))

log_3(18) = log_3(9*2) = log_3(9) + log_3(2) = 2 + log_3(2). Тогда, log_3(18) / (2 + log_3(2)) = (2+log_3(2)) / (2 + log_3(2)) = 1. Ответ: 1