Vào câu tương tự vẫn mình giải thôi

Kết quả :

59049

\(\frac{45^{10}.5^{10}}{75^{10}}=\frac{\left(45.5\right)^{10}}{75^{10}}=\frac{225^{10}}{75^{10}}=\left(\frac{225}{75}\right)^{10}=3^{10}\)

\(\frac{\left(0,8\right)^5}{\left(0,4\right)^6}=\frac{\left(0,4.2\right)^5}{\left(0,4\right)^6}=\frac{\left(0,4\right)^5.2^5}{\left(0,4\right)^6}=\frac{2^5}{0,4}=\frac{32}{0,4}=80\)

\(\frac{45^{10}.5^{10}}{75^{10}}=\frac{\left(45.5\right)^{10}}{75^{10}}=\left(\frac{225}{75}\right)^{10}=3^{10}\)

Ta có : \(\frac{45^{10}.5^{20}}{75^{15}}=\frac{9^{10}.5^{10}.5^{20}}{3^{15}.25^{15}}=\frac{\left(3^2\right)^{10}.5^{30}}{3^{15}.\left(5^2\right)^{15}}=\frac{3^{20}.5^{30}}{3^{15}.5^{30}}=3^5\)

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a)  \(\frac{45^{10}\times5^{20}}{75^{15}}\)

\(=\frac{\left(15\times3\right)^{10}\times5^{20}}{\left(15\times5\right)^{15}}\)

\(=\frac{15^{10}\times3^{10}\times5^{20}}{15^{15}\times5^{15}}\)

\(=\frac{1\times3^{10}\times5^5}{15^5\times1}\)

\(=\frac{3^{10}\times5^5}{\left(3\times5\right)^5}\)

\(=\frac{3^{10}\times5^5}{3^5\times5^5}\)

\(=3^5=243\)

a) A = \(\frac{45^{10}.5^{10}}{75^{10}}=\frac{\left(5.3^2\right)^{10}.5^{10}}{\left(5^2.3\right)^{10}}=\frac{5^{10}.3^{20}.5^{10}}{5^{20}.3^{10}}=\frac{5^{20}.3^{10}}{5^{20}}=3^{10}=59049\)

b) B = \(\frac{\left(0,8\right)^5}{\left(0,4\right)^6}=\frac{\left(0,2.2^2\right)^5}{\left(0,2.2\right)^6}=\frac{\left(0,2\right)^5.2^{10}}{\left(0,2\right)^6.2^6}=\frac{2^4}{0,2}=\frac{16}{0,2}=80\)

c) C = \(\frac{2^{15}.9^4}{6^6.8^3}=\frac{2^{15}.\left(3^2\right)^4}{\left(2.3\right)^6.\left(2^3\right)^3}=\frac{2^{15}.3^8}{2^6.3^6.2^9}=\frac{2^{15}.3^2}{2^{15}}=3^2=9\)

\(A=\frac{\left(9^{10}×5^{10}×5^{10}\right)}{\left(25^{10}×3^{10}\right)}\)

\(A=\frac{\left(3^{20}×5^{20}\right)}{\left(5^{20}×3^{10}\right)}\)

\(A=\frac{3^{20}}{3^{10}}\)

\(A=3^{10}\)

\(\frac{45^{10}.5^{20}}{75^{15}}=\frac{45^{10}.25^{10}}{75^{10}.75^5}=\frac{1125^{10}}{75^{10}.75^5}=\frac{15^{10}}{75^5}=243\)