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JEE Mains · Maths · STD 11- 2. Relation and Function

माना पूर्णांकों का समुच्चय \(Z\) है। यदि \(A=\left\{x \in Z: 2^{(x+2)\left(x^{2}-5 x+6\right)}=1\right\}\) तथा \(B =\{ x \in Z :-3 < 2 x -1 < 9\}\) हो, तो समुच्चय \(A \times B\) के उपसमुच्चयों की संख्या होगी

  1. A \(2^{15}\)
  2. B \(2^{18}\)
  3. C \(2^{12}\)
  4. D \(2^{10}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(2^{15}\)

Step-by-step Solution

Detailed explanation

\(A\, = \,\left\{ {x\, \in \,Z\,:\,{2^{(x\, + 2)({x^2} - 5x + 6)}}\, = \,1} \right\}\) \({2^{(x\, + 2)({x^2} - 5x + 6)}}\, = \,{2^0}\, \Rightarrow \,x\, = \, - \,2,2,3\) \(A\, = \,\{ - 2\,,\,2\,,3\} \) \(B\, = \,\{ x\, \in \,Z\,:\, - \,3\,\, < \,\,2x\, - \,1\, < \,9\} \)…
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