a) \(\dfrac{1}{2}-\left(\dfrac{1}{3}+\dfrac{3}{4}\right)\le x\le\dfrac{1}{24}-\left(\dfrac{1}{8}-\dfrac{1}{3}\right)\)
\(\dfrac{6}{12}-\left(\dfrac{4}{12}+\dfrac{9}{12}\right)\le x\le\dfrac{1}{24}-\left(\dfrac{3}{24}-\dfrac{8}{24}\right)\)
\(\dfrac{6}{12}-\dfrac{13}{12}\le x\le\dfrac{1}{24}-\left(-\dfrac{5}{24}\right)\)
\(-\dfrac{7}{12}\le x\le\dfrac{1}{4}\)
b) Làm rồi :vvv
a) \(-\dfrac{7}{12}\le x\le\dfrac{3}{12}\)
\(x\in\left\{-\dfrac{7}{12};-\dfrac{6}{12};...;\dfrac{3}{12}\right\}\)
b) \(-\dfrac{1}{12}< x< \dfrac{1}{8}\)
\(\Leftrightarrow-\dfrac{2}{24}< x< \dfrac{3}{24}\)
\(x\in\left\{-\dfrac{1}{24};...;\dfrac{2}{24}\right\}\)
