Question

 

Mọi người ơi giúp mình với. Mình cảm ơn

Answer 1

\(=\left[\left(\dfrac{4}{5}\right)^5:\left(\dfrac{2}{5}\right)^6+\dfrac{2^{15}\cdot3^8}{2^9\cdot2^6\cdot3^6}\right]\cdot\dfrac{3^{15}\cdot5^{30}}{3^{20}\cdot5^{30}}\)

\(=\left[\dfrac{4^5}{5^5}\cdot\dfrac{5^6}{2^6}+9\right]\cdot\dfrac{1}{3^5}\)

\(=\dfrac{25}{3^5}=\dfrac{25}{243}\)