Đk:\(\left\{{}\begin{matrix}5-x>0\\2x^2-3x+1\ge0\end{matrix}\right.\)\(\Leftrightarrow\left\{{}\begin{matrix}x< 5\\x\in R\backslash\left(\dfrac{1}{2};1\right)\end{matrix}\right.\)
\(\Rightarrow x\in\left(-\infty;\dfrac{1}{2}\right)\cup\)\([1;5)\)
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