View attachment 174215
Mọi người giúp mình 2 câu này với ạ
[tex]1,\frac{(x+3)\sqrt{-2x+1}}{x+1}\leq 0\Leftrightarrow \left\{\begin{matrix} \frac{x+3}{x+1}\leq 0\\ x\leq \frac{1}{2} \end{matrix}\right. \Leftrightarrow \left\{\begin{matrix} -3\leq x\leq 1\\ x\leq \frac{1}{2} \end{matrix}\right. \Rightarrow -3\leq x\leq \frac{1}{2}[/tex]
[tex]2,\frac{(x+1)\sqrt{2x+1}}{-x+2}\leq 0\Leftrightarrow \frac{(x+1)\sqrt{2x+1}}{x-2}\geq 0\Leftrightarrow \left\{\begin{matrix} \frac{x+1}{x-2}\geq 0\\ x\geq \frac{-1}{2} \end{matrix}\right. \Leftrightarrow \begin{bmatrix} \left\{\begin{matrix} x\leq -1\\ x\geq \frac{-1}{2} \end{matrix}\right.\\ \left\{\begin{matrix} x\geq 2\\ x\geq \frac{-1}{2} \end{matrix}\right. \end{bmatrix}\Rightarrow x\geq 2[/tex]
[TẶNG BẠN] TRỌN BỘ Bí kíp học tốt 08 môn
