A. \(\left[\begin{array}{l} x\le-2 \\ x \geq 1 \end{array}\right.\)
B. \(\left[\begin{array}{l} x<-2 \\ x \geq 1 \end{array}\right.\)
C. \(\left[\begin{array}{l} x<-2 \\ x \geq -1 \end{array}\right.\)
D. \(\left[\begin{array}{l} x\le -2 \\ x \geq 2 \end{array}\right.\)
B
ĐK:
\(\frac{x+1}{x+2}>0\)
\(\Leftrightarrow \left[ \begin{array}{l} \left\{ {\begin{array}{*{20}{l}} {x + 1 \le 0}\\ {x + 2 < 0} \end{array}} \right.\\ \left\{ {\begin{array}{*{20}{l}} {x + 1 \ge 0}\\ {x + 2 > 0} \end{array}} \right. \end{array} \right. \Leftrightarrow \left[ {\begin{array}{*{20}{l}} {x < - 2}\\ {x \ge 1} \end{array}} \right.\)
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