Question

tính giá trị biểu thức 

(0,8)^5/(0,4)^6

Answer 1

\(\dfrac{0,8^5}{0,4^6}=\dfrac{\left(2^3\cdot\dfrac{1}{10}\right)^5}{\left(2^2\cdot\dfrac{1}{10}\right)^6}=\dfrac{2^{15}\cdot\dfrac{1}{10^5}}{2^{12}\cdot\dfrac{1}{10^6}}=\dfrac{2^3}{\dfrac{1}{10}}=2^3\cdot10=80\)