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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2000

  • question_answer
    Which of the following is the empty set:

    A)  [\[x:x\]is a real number and\[{{x}^{2}}-1=0\,\]}

    B)  [\[x:x\]is a real number and \[{{x}^{2}}+1=0\]}

    C)  [\[x:x\]is a real number and\[{{x}^{2}}-9=0\]}

    D)  [\[x:x\]is a real number and\[{{x}^{2}}=x+2\]}

    Correct Answer: B

    Solution :

     Since \[{{x}^{2}}+1=0\Rightarrow x=\pm 1\]


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