Hệ bất phương trình sau \(\...

C

- Hướng dẫn giải

\(\begin{array}{l}\left\{ \begin{array}{l}2x - 1 \ge 3\left( {x - 3} \right)\\\frac{{2 - x}}{2} < x - 3\\\sqrt {x - 3} \ge 2\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l}2x - 1 \ge 3x - 9\\2 - x < 2x - 6\\x - 3 \ge 4\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l} - x \ge - 8\\ - 3x < - 8\\x \ge 7\end{array} \right.\\ \Leftrightarrow \left\{ \begin{array}{l}x \le 8\\x > \frac{8}{3}\\x \ge 7\end{array} \right.\\ \Leftrightarrow 7 \le x \le 8\end{array}\)