Đáp án:
Giải thích các bước giải:
\[\begin{array}{l}
1)\, - 2x + 3 \ge 0 \Leftrightarrow - 2x \ge - 3 \Leftrightarrow x \le \frac{3}{2}\\
2)\,x \ne 0\\
3)\,\left\{ \begin{array}{l}
x + 3 \ne 0\\
x + 3 > 0
\end{array} \right. \Leftrightarrow x > - 3\\
4)\,Khong\,co\,gia\,tri\,nao\,cua\,x\,thoa\,man.\\
5)3x + 4 \ge 0 \Leftrightarrow 3x \ge - 4 \Leftrightarrow x \ge \frac{{ - 4}}{3}\\
6)\,\forall x \in R\\
7)\,\left\{ \begin{array}{l}
1 - 2x \ne 0\\
1 - 2x > 0
\end{array} \right. \Leftrightarrow x < \frac{1}{2}\\
8)\,\left\{ \begin{array}{l}
3x + 5 \ne 0\\
3x + 5 < 0
\end{array} \right. \Leftrightarrow 3x < - 5 \Leftrightarrow x < \frac{{ - 5}}{3}
\end{array}\]
