log₀.₄9 ⋅ log₉2,5 = log(2/5)9 ⋅ log₉(5/2) = log(2/5)9 ⋅ log₉(2/5)⁻¹ = log(2/5)9 ⋅ (-1)log₉(2/5) = - log(2/5)9 ⋅ log₉(2/5) = -1
Ответ: -1