`1/2-(1/3+3/4) ≤ x ≤ 1/24 -(1/8-1/3)`
Ta có :
`1/2-(1/3+3/4) `
`= 1/2-(4/12+9/12)`
`= 1/2-13/12`
`= -7/12`
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`1/24-(1/8-1/3)`
`= 1/24-(3/24-8/24)`
`= 1/24 + 5/24`
`=6/24`
`= 3/12`
`⇒ -7/12 < x < 3/12`
`⇒ x = −7;−6;−5;...;0`
`⇒ x ∈ {−7;−6;−5;...;0}`
$\dfrac{1}{2}$ - ($\dfrac{1}{3}$ + $\dfrac{3}{4}$) \(\le\) x \(\le\) $\dfrac{1}{24}$ - ($\dfrac{1}{8}$ - $\dfrac{1}{3}$)
$\dfrac{1}{2}$ - $\dfrac{13}{12}$ \(\le\) x \(\le\) $\dfrac{1}{24}$ - $\dfrac{-5}{24}$
$\dfrac{-7}{12}$ \(\le\) x \(\le\) $\dfrac{1}{4}$
=> x $\in$ [$\dfrac{-7}{12}$; $\dfrac{1}{4}$]
