bn vt lớn dữ z -.-
\(\frac{15^{19}.5^{10}}{9^{10}.5^{14}}=\frac{3^{19}.5^{19}.5^{10}}{3^{20}.5^{14}}=\frac{3^{19}.5^{29}}{3^{20}.5^{14}}=\frac{5^{15}}{3}\)
\(\frac{15^{19}.5^{10}}{9^{10}.5^{14}}=\frac{3^{19}.5^{19}.5^{10}}{3^{20}.5^{14}}=\frac{3^{19}}{3^{20}}.\frac{5^{29}}{5^{14}}\)\(=\frac{1}{3}.\frac{5^{15}}{1}=\frac{5^{15}}{3}\)
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