\(\left|x-2,5\right|>=0\forall x\)
\(\left|3,5-x\right|>=0\forall x\)
Do đó: \(\left|x-2,5\right|+\left|3,5-x\right|>=0\forall x\)
Dấu '=' xảy ra khi \(\left\{{}\begin{matrix}x-2,5=0\\3,5-x=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=2,5\\x=3,5\end{matrix}\right.\)
=>Loại