Question

Answer 1

\(ĐKXĐ:\left\{{}\begin{matrix}x-2\ge0\\7-x\ge0\\-3-2x\ge0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x\ge2\\x\le7\\x\le-\dfrac{3}{2}\end{matrix}\right.\Leftrightarrow x\in\varnothing\)

Answer 2

ĐK: \(\left\{{}\begin{matrix}x-2\ge0\\7-x\ge0\\-3-2x\ge0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x\ge2\\x\le7\\x\le-\dfrac{3}{2}\end{matrix}\right.\Rightarrow2\le x\le-\dfrac{3}{2}\) (vô lí)

=> PT vô nghiệm

Answer 3

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