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1 tháng 7 2018

\(\frac{4^6.9^5+6^9.120}{8^4.3^{12}+6^{11}}\)    \(=\) \(\frac{\left(2^2\right)^6.\left(3^2\right)^5+2^9.3^9.2^3.3.5}{\left(2^3\right)^4.3^{12}+2^{11}.3^{11}}\) \(=\) \(\frac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{12}.3^{12}+2^{11}.3^{11}}\)

\(=\)   \(\frac{2^{11}.3^{10}.\left(2+2.5\right)}{2^{11}.3^{10}.\left(2.3^2+3\right)}\)  \(=\)   \(\frac{2+10}{2.9+3}\)  \(=\)   \(\frac{12}{21}\)   \(=\)   \(\frac{4}{7}\)

10 tháng 7 2016

\(4^6.9^5+6^9.120:8^4.3^{12}+6^{11}=\frac{4^6.9^5+6^9.120}{8^4.3^{12}+6^{11}}=\frac{ \left(2^2\right)^6.\left(3^2\right)^5+6^9.6.20}{2^3.3^{12}+6^9.6.6}=\frac{2^{12}.3^{10}+20}{2^3.3^{12}+6}=\frac{2^9+20}{3^2+6}\)

\(\frac{2^9+20}{3^2+6}=\frac{512+20}{9+6}=\frac{532}{15}\)

2 tháng 8 2017

Sai hoàn toàn!

7 tháng 8 2016

\(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}.10=\frac{2^{12}.3^{10}+2^9.3^9.120}{2^{12}.3^{12}-2^{11}.3^{11}}.10=\frac{2^{10}.3^{10}\left(2^2+20\right)}{2^{10}.3^{10}\left(6^2-6\right)}.10=\frac{24.10}{30}=8\)

24 tháng 6 2018

Giải:

\(10.\dfrac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)

\(=10.\dfrac{2^{12}.3^{10}+2^9.3^9.2^3.3.5}{2^{12}.3^{12}-2^{11}.3^{11}}\)

\(=10.\dfrac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{12}.3^{12}-2^{11}.3^{11}}\)

\(=10.\dfrac{2^{12}.3^{10}\left(1+5\right)}{2^{11}.3^{11}\left(2.3-1\right)}\)

\(=10.\dfrac{2^{12}.3^{10}.6}{2^{11}.3^{11}.5}\)

\(=10.\dfrac{2^{13}.3^{11}}{2^{11}.3^{11}.5}\)

\(=10.\dfrac{2^2}{5}\)

\(=2^3=8\)

Vậy ...

11 tháng 7 2018

cảm ơn

19 tháng 5 2018

\(10.\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)

\(=10.\frac{2^{12}.3^{10}+2^9.3^9.2^3.3.5}{2^{12}.3^{12}-2^{11}.3^{11}}\)

\(=10.\frac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{12}.3^{12}-2^{11}.3^{11}}\)

\(=10.\frac{2^{12}.3^{10}.\left(1+5\right)}{2^{11}.3^{11}.\left(2.3-1\right)}\)

\(=10.\frac{2.6}{3.5}\)

\(=10.\frac{4}{5}\)

\(=8\)

19 tháng 5 2018

\(10.\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)

\(=10.\frac{\left(2^2\right)^6.\left(3^2\right)^5+\left(2.3\right)^9.2^3.3.5}{\left(2^3\right)^4.3^{12}-\left(2.3\right)^{11}}\)

\(=10.\frac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{12}.3^{12}-2^{11}.3^{11}}\)

\(=10.\frac{2^{12}.3^{10}.\left(1+5\right)}{2^{11}.3^{11}.\left(2.3-1\right)}\)

\(=10.\frac{2.6}{3.5}\)

\(=\frac{10.2.6}{3.5}\)

\(=\frac{2.5.2.2.3}{3.5}\)

\(=2.2.2\)

\(=2^3\)

\(=8\)

10.46.95+69.120 :; 84.312-611

21 tháng 4 2016

ket qua bang 29 nha ban

27 tháng 7 2017

ket qua bang -4/3 nha ban