Question

[dora]

tìm số tự nhiên x biết :

2/7 < 4/x < 1/3

Answer 1

[Dũng Lê Trí]

\(\frac{2}{7}< \frac{4}{x}< \frac{1}{3}\)

\(\Rightarrow\frac{4}{14}< \frac{4}{x}< \frac{4}{12}\)

\(\Rightarrow\frac{4}{14}< \frac{4}{13}< \frac{4}{12}\)

Vậy x = 13

Answer 2

[@Hà'h_Nguyễn't...#.....]

1. ^{\(\frac{2}{7}< \frac{4}{x}< \frac{1}{3}=\frac{4}{14}< \frac{4}{x}< \frac{4}{12}\)}