Ta có:\(\frac{3^8.11+3^{10}.5}{3^9.2^4}\)=\(\frac{3^8.11+3^8.3^2.5}{3^9.2^4}\)=\(\frac{3^8.11+3^8.9.5}{3^9.2^4}\)=\(\frac{3^8.11+3^8.45}{3^9.2^4}\)=\(\frac{3^8.\left(11+45\right)}{3^9.2^4}\)=\(\frac{3^8.56}{3^9.2^4}\)=\(\frac{3^8.2^3.7}{3^9.2^4}\)=\(\frac{7}{3.2}\)=\(\frac{7}{6}\)
