a/ ĐKXĐ: \(\sqrt{3-2x}>0\Leftrightarrow3-2x>0\Leftrightarrow2x< 3\Leftrightarrow x< \dfrac{3}{2}\)
b/ ĐKXĐ: \(\left\{{}\begin{matrix}x>0\\2-\sqrt{x}\ne0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x>0\\\sqrt{x}\ne2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x>0\\x\ne4\end{matrix}\right.\)
c/đkxđ: \(\sqrt{-x}\ge0\Leftrightarrow x\le0\)