\(=\frac{3^7.5^4.7^9}{3^3.5^2.7^5}\)
\(=3^4.5^2.7^4\)
= ... ( tính máy )
\(\frac{\left(3^2.5.7^9\right)\left(5^3.3^5\right)}{3^3.5^2.7^5}\)
\(=\frac{\left(3^7.5^4.7^9\right)}{3^3.5^2.7^5}\)
\(=3^4.5^2.7^4\)
\(=81.25.2401\)
\(=\text{4862025}\)
\(\frac{\left(3^2.5.7^9\right).\left(3^5.5^3\right)}{\left(3^3.5^2.7^5\right)}\)
\(=\frac{3^2.5.7^9.3^5.5^3}{3^3.5^2.7^5}\)
\(=\frac{3^7.5^6.7^9}{3^3.5^2.7^5}\)
\(=\frac{3^7}{3^3}.\frac{5^6}{5^2}.\frac{7^9}{7^5}\)
\(=3^2.5^4.7^4\)
\(=9.625.2401\)
\(=13505625\)
