Interval: $(-\infty,\ -2]\ \cup\ [0,\ \infty)$
Work Step by Step
$|x+1|\geq 1$ We split the absolute value into the positive and negative: $x+1\geq 1$ $x\geq 0$ $x+1\leq-1$ $x\leq-2$ Interval: $(-\infty,\ -2]\ \cup\ [0,\ \infty)$
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