mờ quá mk ko thấy j cả! :_(
h) Ta có: \(\dfrac{x+2}{5}\ge0\)
nên \(x+2\ge0\)
hay \(x\ge-2\)
i) Ta có: \(\dfrac{x+2}{x-3}< 0\)
nên \(\left\{{}\begin{matrix}x+2>0\\x-3< 0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x>-2\\x< 3\end{matrix}\right.\Leftrightarrow-2< x< 3\)