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Ответ:

log₅ 2.5 + log₅ 10 = 2

Пошаговое объяснение:

log₅ 2.5 + log₅ 10 = log₅ (2,5*10) = log₅ 25 = log₅ 5² = 2*log₅ 5 = 2

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