Question

6/16:3/6 < x < 20/21 : 4/21

8/21 x 7 /2 < x < 11/8 x 4

Answer 1

a: =>3/8x6/3<x<20/21x21/4

=>3/4<x<5

hay \(x\in\left\{1;2;3;4\right\}\)

b: =>56/42<x<11/2

=>4/3<x<11/2

nên \(x\in\left\{2;3;4;5\right\}\)