Question

Answer 1

b)y<\(\dfrac{2}{7}:\dfrac{8}{21}\)

y<\(\dfrac{3}{4}\)

y<\(\dfrac{3}{4}\)<1

y=0

Answer 2

b) Ta có: \(y< \dfrac{2}{7}:\dfrac{8}{21}\)

\(\Leftrightarrow y< \dfrac{2}{7}\cdot\dfrac{21}{8}=\dfrac{3}{4}\)

hay y=0

Answer 3

Ta có:

    \(y< \dfrac{2}{7}:\dfrac{8}{21}\)

\(\Rightarrow y< \dfrac{2}{7}.\dfrac{21}{8}\\ \Rightarrow y< \dfrac{3}{4}\)

Ta thấy \(\dfrac{3}{4}< 1\)

\(\Rightarrow y< \dfrac{3}{4}< 1\)

và \(y\) là số tự nhiên nên \(y=0\)

     Vậy \(y=0\)