Ответ:
log9 (125) / log9 (5) = log5 (125) =
= log5 (5³) = 3
Объяснение:
log9 (125) / log9 (5) =
так как log a (b) / log a (c) = log c (b)
= log5 (125) =
так как 125 = 5*5*5 = 5^3
= log5 (5³) =
так как log a (b^c) = c * log a (b),
= 3 * log 5 (5) =
так как log a (a) = 1
= 3 *1 = 3
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Ответ:
log9 (125) / log9 (5) = log5 (125) =
= log5 (5³) = 3
Объяснение:
log9 (125) / log9 (5) =
так как log a (b) / log a (c) = log c (b)
= log5 (125) =
так как 125 = 5*5*5 = 5^3
= log5 (5³) =
так как log a (b^c) = c * log a (b),
= 3 * log 5 (5) =
так как log a (a) = 1
= 3 *1 = 3