Question

Tìm số tự nhiên x biết :

1<x/3<5/3

Answer 1

\(1< \dfrac{x}{3}< \dfrac{5}{3}\)

\(\Leftrightarrow3< x< 5\Leftrightarrow x=4\)

Answer 2

\(1< \dfrac{x}{3}< \dfrac{5}{3}\)

\(\Rightarrow\dfrac{3}{3}< \dfrac{x}{3}< \dfrac{5}{3}\)

\(\Rightarrow x=4\)

Vậy x=4

Hoctot

Answer 3

\(1< \dfrac{x}{3}< \dfrac{5}{3}\)

<=> \(\dfrac{3}{3}< \dfrac{x}{3}< \dfrac{5}{3}\)

<=> 3 < x < 5

<=> \(x\in\left\{4\right\}\)