1. Tardigrade
  2. Question
  3. Mathematics
  4. Let A= x ∈ R:|x+1|<2 and B = x ∈ R :| x -1| ≥ 2 . Then which one of the following statements is N O T true ?

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Q. Let $A=\{x \in R:|x+1|<2\}$ and $B =\{ x \in R :| x -1| \geq 2\}$. Then which one of the following statements is $N O T$ true ?

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Solution:

$A : x \in(-3,1) B : x \in(-\infty,-1] \cup[3, \infty)$
$B - A =(-\infty,-3] \cup[3, \infty)= R -(-3,3)$