\(\frac{\left(1,2\right)^6}{\left(0,3\right)^5.\left(0,2\right)^7}\)
\(=\frac{\left(\frac{6}{5}\right)^6}{\left(\frac{3}{10}\right)^5.\left(\frac{1}{5}\right)^7}\)
\(=\frac{\frac{6^6}{5^6}}{\frac{3^5}{10^5}.\frac{1}{5^7}}\)
\(=\frac{\frac{6^6}{5^6}}{\frac{3^5}{10^5.5^7}}\)
\(=\frac{6^6}{5^6}.\frac{10^5.5^7}{3^5}\)
\(=\frac{\left(2.3\right)^6.\left(2.5\right)^5.5}{3^5}\)
\(=\frac{2^6.3^6.2^5.5^5.5}{3^5}\)
\(=2^{11}.3.5^6\)
( ko chắc )