сумма логарифмов ---это лгарифм произведения...
...= lg(75*50*9/125) = lg(15*2*9) = lg(270) = lg(3^3) + lg(10) = 3lg(3) + 1
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сумма логарифмов ---это лгарифм произведения...
...= lg(75*50*9/125) = lg(15*2*9) = lg(270) = lg(3^3) + lg(10) = 3lg(3) + 1