Question

Answer 1

Các bạn ơi, giúp mình với, giải chi tiết nhé

Answer 2

2/3<10/x<5/6

=>10/15<10/x<10/12

=>15>x>12

hay \(x\in\left\{14;13\right\}\)

Answer 3

Ta có :

`2/3=10/15`

`5/6=10/12`

`=>10/15<10/x<10/12`

`=>x={14;13}`

Answer 4

`2/3 < 10/x < 5/6`

Quy đồng tử số :

`2/3 = ( 2 xx 5)/(3xx5) = 10/15`

`5/6 = (5xx2)/(6xx2) = 10/12`

` => 10/15 < 10/x < 10/12`

Ta có : `15 > x > 12`

`=> x ∈ {13,14}`

`=> 2/3 < 10/13; 10/14 < 5/6`

Answer 5

`2/3 <10/x < 5/6`
`-> 2/3 . 6 < 60/x < 5/6 . 6`
`-> 4 < 60/x < 5`
`-> 4x < 60 < 5x`
Xét `4x < 60 -> x< 15`
Xét `60 < 5x -> x> 12`
`-> 12 <x<15`
`-> x \in {13 ;14}`