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JEE Mains · Maths · STD 11 - 1. set theory

ધારો કે  \(A =\{ x \in R :| x +1|<2\}\) અને  \(B=\{x \in R:|x-1| \geq 2\}\) તો નીયેના પૈકી કયું વિધાન સાચું નથી?

  1. A \(A - B =(-1,1)\)
  2. B \(B - A = R -(-3,1)\)
  3. C \(A \cap B =(-3,-1]\)
  4. D \(A \cup B = R -[1,3)\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(B - A = R -(-3,1)\)

Step-by-step Solution

Detailed explanation

\(A = \{ x \in R : |x+1| < 2 \} \Rightarrow -2 < x+1 < 2 \Rightarrow -3 < x < 1\) \(A = (-3, 1)\) \(B = \{ x \in R : |x-1| \geq 2 \} \Rightarrow x-1 \geq 2 \text{ or } x-1 \leq -2 \Rightarrow x \geq 3 \text{ or } x \leq -1\) \(B = (-\infty, -1] \cup [3, \infty)\)…
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