Ta có : 

\(A=\frac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}=\frac{2^{12}.3^{10}+2^3.3.5.2^9.3^9}{2^{12}.3^{12}+2^{11}.3^{11}}=\frac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{12}.3^{12}+2^{11}.3^{11}}=\frac{2^{12}.3^{10}\left(1+5\right)}{2^{11}.3^{11}\left(6+1\right)}=\frac{12}{21}=\frac{4}{7}\)

Chúc bạn học tốt ~

\(\dfrac{16^3.3^{10}+144.6^9}{4^6.3^{12}+6^{11}}\)

=\(\dfrac{16^3.3^{10}+144.6^9}{4.4.4.4.4.4.3^{12}+6^{11}}\)

=\(\dfrac{16^3.3^{10}+144.6^9}{16.16.16.3^{12}+6^{11}}\)

=\(\dfrac{16^3.3^{10}+4.6^2.6^9}{16^3.3^{12}+6^{11}}\)

=\(\dfrac{4.6^{11}}{3^2+6^{11}}\)

=\(\dfrac{4}{9}\)

Ko chắc

tử số  4⁶.3¹⁰+144.6⁹ = 2¹².3¹⁰+2.2³.3.3.6⁹

= 6⁹.(2³.3)+(2³.3).6⁹.6 = 6⁹.(2³.3).(6+1) = 6⁹.(2³.3).7 = 6⁹.2.3.2².7

= 6¹⁰.4.7

mẫu số 4⁶.3¹²+6¹¹ = 2¹².3¹²+6¹¹ = 6¹²+6¹¹ = 6¹¹.6+6¹¹ 

= 6¹¹.(6+1) = 6¹¹.7

\(\dfrac{16^{3}.3^{10}+144.6^{9}}{4^{6}.3^{12}.6^{11}}=\dfrac{6^{10}.4.7}{6^{11}.7}\)=\(\dfrac{4}{6}=\dfrac{2}{3}\)

 mà cậu trình bày trên phân số nhé để nhanh thì mình chia ra thôi

\(\dfrac{16^3.3^{10}+144.6^9}{4^6.3^{12}+6^{11}}\) 

=\(\dfrac{2^{12}.3^{10}+2.2^3.3.3.6^9}{2^{12}.3^{12}+6^{11}}\) 

=\(\dfrac{6^9.\left(2^3.3\right)+\left(2^3.3\right).6^9.6}{6^{12}+6^{11}}\) 

=\(\dfrac{6^9.\left(2^3.3\right).\left(6+1\right)}{6^{11}.6+6^{11}}\) 

=\(\dfrac{6^9.2.3.2^2.7}{6^{11}.\left(6+1\right)}\) 

=\(\dfrac{6^{10}.4.7}{6^{11}.7}\) 

=\(\dfrac{4}{6}=\dfrac{2}{3}\)

\(A=\dfrac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}=\dfrac{\left(4^2\right)^3.3^{10}+2^3.3.5\left(2.3\right)^9}{\left(2^2\right)^6.3^{12}+\left(2.3\right)^{11}}\)

\(A=\dfrac{2^{12}.3^{10}+2^{12}.3^{10}.5}{2^{12}.3^{12}+2^{11}.3^{11}}=\dfrac{2^{11}.3^{10}\left(2+2.5\right)}{2^{11}.3^{10}\left(2.3^2+3\right)}\)

\(A=\dfrac{2+10}{18+3}=\dfrac{12}{21}=\dfrac{4}{7}\)

a) \(3^{30}\) và \(5^{20}.\)

Ta có:

\(3^{30}=\left(3^3\right)^{10}=27^{10}.\)

\(5^{20}=\left(5^2\right)^{10}=25^{10}.\)

Vì \(27>25\) nên \(27^{10}>25^{10}.\)

\(\Rightarrow3^{30}>5^{20}.\)

Chúc bạn học tốt!

a/ Có: \(3^{30}=\left(3^3\right)^{10}=27^{10}\\ 5^{20}=\left(5^2\right)^{10}=25^{10}\)

Mà \(27^{10}>25^{10}\)

\(\Rightarrow3^{30}=5^{20}\)

b/ \(A=\frac{16^3\cdot3^{10}+120\cdot6^9}{4^6\cdot3^{12}+6^{11}}\\ A=\frac{\left(2^4\right)^3\cdot3^{10}+2^3\cdot3\cdot5\cdot2^9\cdot3^9}{\left(2^2\right)^6\cdot3^{12}+2^{11}\cdot3^{11}}\\ A=\frac{2^{12}\cdot3^{10}+2^{12}\cdot3^{10}\cdot5}{2^{12}\cdot3^{12}+2^{11}\cdot3^{11}}\\ A=\frac{2^{12}\cdot3^{10}\cdot\left(1+5\right)}{2^{11}\cdot3^{11}\cdot\left(2\cdot3+1\right)}\\ A=\frac{2\cdot6}{3\cdot7}=\frac{4}{7}\)

\(\frac{3^{17}\cdot81^{11}}{27^{10}\cdot9^{15}}\)

\(=\frac{3^{17}\cdot\left(3^4\right)^{11}}{\left(3^3\right)^{10}\cdot\left(3^2\right)^{15}}\)

\(=\frac{3^{17}\cdot3^{44}}{3^{30}\cdot3^{30}}\)

\(=\frac{3^{61}}{3^{60}}\)

\(=3\)

\(\frac{9^2\cdot2^{11}}{16^2\cdot6^3}\)

\(=\frac{\left(3^2\right)^2\cdot2^{11}}{\left(2^4\right)^2\cdot\left(2\cdot3\right)^3}\)

\(=\frac{3^4\cdot2^{11}}{2^8\cdot2^3\cdot3^3}\)

\(=\frac{3^4\cdot2^{11}}{2^{11}\cdot3^3}\)

\(=\frac{3^4}{3^3}\)

\(=3\)

\(\frac{2^{10}\cdot3^{31}+2^{40}\cdot3^6}{2^{11}\cdot3^{31}+2^{41}\cdot3^6}\)

\(=\frac{2^{10}\cdot3^{31}+2^{40}\cdot3^6}{2\cdot\left(2^{10}\cdot3^{31}+2^{40}\cdot3^6\right)}\)

\(=\frac{1}{2}\)