Question

[Phạm Duy Anh]

Ai giúp mik câu c vs d đi ạ

Answer 1

[Lấp La Lấp Lánh]

c) \(\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{12}\le x\le\dfrac{7}{10}+\dfrac{27}{6}\)

\(\Leftrightarrow\dfrac{2}{3}\le x\le\dfrac{26}{5}=5,2\), mà \(x\in Z\)

\(\Rightarrow x\in\left\{1;2;3;4;5\right\}\)

d) \(-\dfrac{31}{14}+\dfrac{115}{131}+\dfrac{111}{74}\le x\le\dfrac{6}{36}+\dfrac{9}{27}+\dfrac{48}{96}\)

\(\Leftrightarrow\dfrac{150}{917}\le x\le1\) , mà \(x\in Z\)

\(\Rightarrow x=1\)