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

\(Z\)એ પૂર્ણાક સંખ્યાઓ નો ગણ છે. જો \(A\, = \,\{ x\, \in \,Z\,:\,{2^{(x + 2)({x^2} - 5x + 6)}} = 1\} \) અને \(B\, = \,\{ x\, \in \,Z\,:\, - 3\, < \,2x\, - 1\, < \,9\} ,\) તો ગણ \(A \times  B,\) ના કુલ ઉપગણો ની સંખ્યા મેળવો.

  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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