Question

rút gọn các phân số sau.

                           990/2610               ;             374/506         ;          3600-75/ 8400-175        ; 9^14 . 225^5 .8^7/ 18^12 . 625^3 . 24^3

Answer 1

\(\frac{990}{2610}=\frac{990:11}{2610:11}=\frac{11}{29}\)

\(\frac{374}{506}=\frac{374:22}{506:22}=\frac{17}{23}\)

\(\frac{3600-75}{8400-175}=\frac{3525}{8225}=\frac{3525:1175}{8225:1175}=\frac{3}{7}\)

\(\frac{9^{14}.255^5.8^7}{18^{12}.625^3.24^3}=\frac{3^{28}.5^5.3^5.17^5.2^{21}}{2^{12}.3^{24}.5^{12}.2^9.3^3}=\frac{3^{33}.5^5.17^5.2^{21}}{2^{21}.3^{27}.5^{12}}=\frac{3^6.17^5}{5^7}\)