Question

          Tính :

                       D = \(\dfrac{72^3.54^2}{108^4}\)

Answer 1

=8

Answer 2

\(\dfrac{72^3.54^2}{108^4}\)

\(=\dfrac{18^3.4^3.18^2.3^2}{18^4.6^4}\)

\(=\dfrac{18^5.2^6.3^2}{18^4.2^4.3^4}\)

\(=\dfrac{18.2^2}{3^2}\)

\(=\dfrac{9.2.2^2}{9}\)

\(=2^3=8\)

Answer 3

\(D=\dfrac{72^3\cdot54^2}{108^4}=\dfrac{2^9\cdot3^6\cdot2^2\cdot3^6}{2^8\cdot3^{12}}=2^3=8\)