Ответ(ы) на вопрос:
Гостьlog3 (4/81)^(1/2) - log3 (8/27)^(1/3) =
= log3 (2/9) - log3 (2/3) =
= log3 (2/9 : 2/3) =
= log3 (2/9 * 3/2) =
= log3 (3/9) =
= log3 (1/3) =
= log3 (3^(-1)) =
= - 1
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