Question

ac giúp e câu này ạ e cảm ơn ạ

Answer 1

A :  \(3\le x< 4\)

B : \(x>2\)

Answer 2

B/t A có nghĩa \(\Leftrightarrow\left\{{}\begin{matrix}x-3\ge0\\4-x>0\end{matrix}\right.\)  \(\Leftrightarrow3\le x< 4\)

B/t B có nghĩa \(\Leftrightarrow\left\{{}\begin{matrix}x-1>0\\x^2-4x+4>0\end{matrix}\right.\)  \(\Leftrightarrow\left\{{}\begin{matrix}x>1\\\left(x-2\right)^2>0\end{matrix}\right.\)  \(\Leftrightarrow2\ne x>1\)