\(\frac{45^{10}.5^{20}}{75^{15}}\)
\(=\frac{5.3^{20}.5^{20}}{\left(5^2.3\right)^{15}}=\frac{5^{21}.3^{20}}{5^{30}.3^{15}}=\frac{5^{21}.3^{15}.3^5}{5^{21}.5^9.3^{15}}=\frac{3^5}{5^9}\).
\(\frac{45^{10}.5^{20}}{75^{15}}=\frac{\left(9.5\right)^{10}.5^{20}}{\left(3.25\right)^{15}}\)
\(=\frac{9^{10}.5^{10}.5^{20}}{3^{15}.25^{15}}\)
\(=\frac{\left(3^2\right)^{10}.5^{10}.5^{20}}{3^{15}.\left(5^2\right)^{15}}\)
\(=\frac{3^{20}.5^{30}}{3^{15}.5^{30}}\)
\(=\frac{3^{20}}{3^{15}}\)
\(=3^5\)
\(=243\)
xin lỗi mk lớp 5 . nhưng bạn kết bạn với mk nha
4510.520/7515=(5.32)10.520/(3.52)15=510.320.520/315.530=530.320/315.530=35/1=243
