## College Algebra 7th Edition

Interval: $[-4,\ -1]\cup [1$, 4 $]$
$1\leq|x|\leq 4$ There are two possibilities. If $x$ is positive, then $|x|=x$: $1\leq|x|\leq 4$ $1\leq x\leq 4$ If $x$ is negative, then $|x|=-x$: $1\leq|x|\leq 4$ $1\leq-x\leq 4$ $-1\geq x\geq-4$ $-4\leq x\leq-1$ Interval: $[-4,\ -1]\cup [1$, 4 $]$