ĐKXĐ: \(\left\{{}\begin{matrix}x-m+2\ge0\\\sqrt{x-m+2}-1\ne0\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}x\ge m-2\\x\ne m-1\end{matrix}\right.\)
Hàm xác định trên (0;1) khi:
\(\left\{{}\begin{matrix}m-2\le0\\\left[{}\begin{matrix}m-1\ge1\\m-1\le0\end{matrix}\right.\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}m\le1\\m=2\end{matrix}\right.\)