ĐKXĐ: \(\left\{{}\begin{matrix}2x-1\ne0\\x+3\ne0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ne\frac{1}{2}\\x\ne-3\end{matrix}\right.\)
\(\Rightarrow D=R\backslash\left\{\frac{1}{2};-3\right\}\)
ĐK:\(\left\{{}\begin{matrix}2x-1\ne0\\x+3\ne0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ne\frac{1}{2}\\x\ne-3\end{matrix}\right.\\ TXĐ:D=R\backslash\left\{-3;\frac{1}{2}\right\}\)