Question

Сократите пожалуйста эти циферки

Answer 1

$\frac{128\bullet3^9}{243\bullet25}=\frac{128\bullet3^9}{3^5\bullet25}= \frac{128\bullet3^{9-5}}{25}=\frac{128\bullet3^4}{25}=\frac{128\bullet81}{25}=\frac{10368}{25}=\frac{41472}{100}=414,72;\\\\\frac{x^{n+m}}{x^{n+1}\bullet x^{m-1}}=\frac{x^n\bullet x^m}{x^n\bullet x^1\bullet x^m\bullet x^{-1}}=\frac{1}{x^1\bullet x^{-1}}=\frac{1}{x^{1-1}}=\frac{1}{x^0}=\frac{1}{1}=1.$