Question

2./x-3,5/=1/2 gấp ạ

Answer 1

`2.|x-3,5|=1/2`

`->|x-3,5|=0,5:2`

`->|x-3,5|=0,25`

`->` \(\left[\begin{array}{} x-3,5=0,25\\ x-3,5=-0,25 \end{array} \right.\)

`->` \(\left[\begin{array}{} x=3,75\\ x=3,25\end{array} \right.\)

Answer 2

x1=3.75

x2=3.25

Answer 3

Ta có: \(2\left|x-3.5\right|=\dfrac{1}{2}\)
\(\Leftrightarrow\left|x-\dfrac{7}{2}\right|=\dfrac{1}{2}:2=\dfrac{1}{4}\)

\(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{7}{2}=\dfrac{1}{4}\\x-\dfrac{7}{2}=-\dfrac{1}{4}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{15}{4}\\x=\dfrac{13}{4}\end{matrix}\right.\)