Question

tìm số nguyên x thuộc N* thỏa mãn : 1/7 < x/7 < 4/7

 

 

Answer 1

x∈{2;3}

Answer 2

\(\dfrac{1}{7}< \dfrac{x}{7}< \dfrac{4}{7}\)

<=> 1 < x < 4

<=> x = \(\left\{2;3\right\}\)

Answer 3

\(x\in\left\{2;3\right\}\)

Answer 4

Thay x = \(\left\{2;3\right\}\) thành \(x\in\left\{2;3\right\}\) giùm mik