Question

bài 3 : tính 

2^3/64

2^4/128

36 /2^9

Answer 1

\(\dfrac{2^3}{64}=\dfrac{8}{64}=\dfrac{1}{8}\)

\(\dfrac{2^4}{128}=\dfrac{16}{128}=\dfrac{1}{8}\)

\(\dfrac{36}{2^9}=\dfrac{36}{512}=\dfrac{9}{128}\)

Answer 2

\(\dfrac{2^3}{64}=\left(\dfrac{2}{4}\right)^3=\left(\dfrac{1}{2}\right)^3=\dfrac{1}{8}\)

\(\dfrac{2^4}{128}=\dfrac{2^4}{2^7}=2^{-3}=\dfrac{1}{2^3}=\dfrac{1}{8}\)

\(\dfrac{36}{2^9}=\dfrac{2^2.3^2}{2^9}=\dfrac{3^2}{2^7}=\dfrac{9}{128}\)