=> \(\left[x\right]=6\)
=> \(\left[{}\begin{matrix}x=6\\x=-6\end{matrix}\right.\)
\(|x|-1=5\)
⇔\(|x|=6\)
⇔\(\left[{}\begin{matrix}x=6\\x=-6\end{matrix}\right.\)
\(\Rightarrow\left|x\right|=6\Rightarrow\left[{}\begin{matrix}x=6\\x=-6\end{matrix}\right.\) Vậy...
\(|x|=6\)
\(\Rightarrow x=6\) hoặc -6
vậy...
Ta có: \(\left|x\right|-1=5\)
\(\Leftrightarrow\left|x\right|=5+1=6\)
hay \(x\in\left\{6;-6\right\}\)
Vậy: \(x\in\left\{6;-6\right\}\)