`Answer:`

`(4^6 . 9^5 + 6^9 . 120)/(8^4 . 3^12  - 6^11)`

`= (2^12 . 3^10 + 2^9 . 3^9 . 2^3 . 3 . 5)/(2^12 . 3^12 - 2^11 . 3^11)`

`= (2^12 . 3^10 + 2^12 . 3^10 . 5)/(2^11 . 3^11(2 . 3 - 1))`

`= (2^12 . 3^10 (1 + 5))/(2^11 . 3^11 . 5)`

`= (2 . 6)/(3 . 5)`

`= 4/5`

\(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\) đề là như thế này à hay là sao ???

\(\frac{4^6.4^5+6^9.120}{8^4.3^{12}-6^{11}}\)

bạn tự làm nhà, mk tính mệt wá mà mãi ko ra kq

=3627970560

=1813985280

\(\frac{10.4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}=\frac{2.5.\left(2.2\right)^6.\left(3.3\right)^5+\left(2.3\right)^9.3.40}{\left(2.2.2\right)^4.3^{12}-\left(2.3\right)^{11}}=\frac{2.5.2^6.2^6.3^5.3^5+2^9.3^9.3.40}{2^4.2^4.2^4.3^{12}-2^{11}.3^{11}}\)

\(=\frac{2^{13}.5.3^{10}+2^{12}.5.3^{10}}{2^{12}.3^{12}-2^{11}.3^{11}}=\frac{2^{12}.5.3^{10}.\left(2+1\right)}{2^{11}.3^{11}\left(2.3-1\right)}=\frac{2^{12}.5.3^{11}}{2^{11}.5.3^{11}}=2\)

=(2²)⁶.(3²)⁵+(2.3)⁹.2³.3.5/(2³)⁴.3¹²-(2.3)¹¹

=2¹².3¹⁰+2⁹.3⁹.2³.3.5/2¹².3¹²-2¹¹.3¹¹

=2¹².3¹⁰+2¹².3¹⁰.5/2¹¹.3¹¹(2.3-1)

=2¹².3¹⁰(1+5)/2¹¹.3¹¹.5

=2.6/3.5

=4/5

Mình nghĩ đề đúng là :

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

\(=\frac{2^{12}.3^{10}+2^9.3^9.3.5.2^3}{2^{12}.3^{12}-2^{11}.3^{11}}\)

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

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

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

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

\(=\frac{2^2}{5}\)

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

\(\dfrac{10.4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}=\dfrac{5.2.2^{12}.3^{10}+3^9.2^9.2^3.3.5}{2^{12}.3^{12}-2^{11}.3^{11}}\)

\(=\dfrac{5.2^{13}.3^{10}+2^{12}.3^{10}.5}{2^{11}.3^{11}\left(2.3-1\right)}=\dfrac{2^{12}.3^{10}.5\left(2+1\right)}{2^{11}.3^{11}.5}\)

\(=\dfrac{2^{11}.2.3^{10}.5.3}{2^{11}.3^{10}.3.5}=2\)