\(1< \frac{x}{3}< 2\)
\(\Leftrightarrow\frac{3}{3}< \frac{x}{3}< \frac{6}{3}\)
\(\Leftrightarrow\frac{x}{3}\in\left\{\frac{4}{3};\frac{5}{3}\right\}\)
\(\Leftrightarrow x\in\left\{4;5\right\}\)
\(\Leftrightarrow\frac{3}{3}< \frac{x}{3}< \frac{6}{3}\)
\(\Leftrightarrow3< x< 6\)
\(\Leftrightarrow\orbr{\begin{cases}x=4\\x=5\end{cases}}\)
\(1< \frac{x}{3}< 2\)
\(\Rightarrow\frac{3}{3}< \frac{x}{3}< \frac{6}{3}\)
\(\Rightarrow3< x< 6\)
\(\Rightarrow x\in\left\{4;5\right\}\)
\(1< \frac{x}{3}< 2\)
\(\Rightarrow\frac{3}{3}< \frac{x}{3}< \frac{6}{3}\)
\(\Rightarrow3< x< 6\)
\(\Rightarrow x\in\left\{4;5\right\}\)
1<x3<2⇒33<x3<631<x3<2⇒33<x3<63 nên 3<x<63<x<6
Vì xx là số nguyên nên x=4;x=5x=4;x=5
Vậy có hai giá trị tìm được là x=4;x=5
