Toán Lớp 7: /x-1/+/x-2/=4x
giúp mk nhé mn ơi
cảm ơn mn nhiều lắm
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Toán Lớp 7: /x-1/+/x-2/=4x
giúp mk nhé mn ơi
cảm ơn mn nhiều lắm
Comments ( 2 )
\left| {x – 1} \right| + \left| {x – 2} \right| = 4x\\
\to \left[ \begin{array}{l}
x – 1 + x – 2 = 4x\left( {DK:x \ge 2} \right)\\
x – 1 – x + 2 = 4x\left( {DK:2 > x \ge 1} \right)\\
– x + 1 – x + 2 = 4x\left( {DK:x < 1} \right)
\end{array} \right.\\
\to \left[ \begin{array}{l}
2x = – 3\\
4x = 1\\
6x = 3
\end{array} \right.\\
\to \left[ \begin{array}{l}
x = – \dfrac{3}{2}\left( l \right)\\
x = \dfrac{1}{4}\left( l \right)\\
x = \dfrac{1}{2}\left( {TM} \right)
\end{array} \right.
\end{array}\)