Question

tính giá trị biểu thức 

a,A=\(\frac{2^{13}.5^2.2^6.3^4}{8.2^{18}.81.5}\)

Answer 1

A = \(\frac{2^{13}.5^2.2^6.3^4}{8.2^{18}.81.5}\)

   = \(\frac{2^{19}.5^2.3^4}{2^3.2^{18}.3^4.5}\)

   = \(\frac{2^{19}.5^2.3^4}{2^{21}.3^4.5}\) 

   = \(\frac{5}{2^2}\) = \(\frac{5}{4}\)

Answer 2

\(A=\frac{2^{13}.5^2.2^6.3^4}{8.2^{18}.81.5}\)

\(A=\frac{2^{19}.5^2.3^4}{2^{21}.3^4.5}=\frac{5}{2^3}=\frac{5}{8}\)

Answer 3

\(A=.................=\frac{2^3.2^{10}.5^2.2^6.3^4}{2^3.2^{10}.2^6.2^2.3^4.5}=\frac{5}{2^2.5}=\frac{1}{2^2}=\frac{1}{4}\)

chắc như thế này , k chắc