Question

Answer 1

tìm đkxđ giúp mik vs,chỉ đkxđ thôi nhé

Answer 2

ĐKXĐ:\(\left\{{}\begin{matrix}x>0\\x\ne9\\\sqrt{x}-3\ne0\end{matrix}\right.\)\(\Rightarrow\left\{{}\begin{matrix}x>0\\x\ne9\end{matrix}\right.\)

Answer 3

\(\left\{{}\begin{matrix}x\ge0\\x\ne9\end{matrix}\right.\)