Question

            9^14 x 25^5 x 8^7

       ______________________

           18^12 x 625^3 x 24^3

Answer 1

đổi ra thành thừa số nguyên tố rồi (ví dụ 9^2=(3^2)^2=3^4) rồi rút gọn là ra!!!

Answer 2

\(\frac{9^{14}\cdot25^5\cdot8^7}{18^{12}\cdot625^3\cdot24^3}=\frac{9^{14}\cdot25^5\cdot8^7}{9^{12}\cdot2^{12}\cdot25^6\cdot8^3\cdot3^3}=\frac{9^2\cdot8^4}{2^{12}\cdot25\cdot3^3}=\frac{3}{25}\)

Answer 3

\(\frac{9^{14}.25^5.8^7}{18^{12}.625^3.24^3}=\frac{9^{14}.25^5.8^7}{9^{12}.2^{12}.25^6.8^3.3^3}=\frac{9^{12}.9.9.25^5.8^3.8.8.8.8}{9^{12}.2^{12}.25^5.25^1.8^3.3^3}=\frac{9.9.8.8.8.8}{2^{12}.25.3^3}\)

\(\Leftrightarrow\frac{9^2.8^4}{2^{12}.25.3^3}=\frac{3}{25}\)