Предмет: Алгебра, автор: cappo

помогите решить)пожалуйста

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Автор ответа: Аноним

разлогаешь 400 на простые множители:
400=2×2×2×2×5×5=2^4×5^2
2log3(x)=4
log3(x)=2
x=3^2=9
Ответ: 9

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