TH1: \(\hept{\begin{cases}2x-1>0\\x+3< 0\end{cases}}\)<=> \(\hept{\begin{cases}x>\frac{1}{2}\\x< -3\end{cases}}\)<=>x\(\in\)\(\Phi\)
TH2: \(\hept{\begin{cases}2x-1< 0\\x+3>0\end{cases}}\)<=>\(\hept{\begin{cases}x< \frac{1}{2}\\x>-3\end{cases}}\)<=> -3<x<\(\frac{1}{2}\)
k nha