JEE Main & Advanced Mathematics Sets Question Bank Set theory

  • question_answer
    If \[Q=\left\{ x:x=\frac{1}{y},\,\text{where }y\in N \right\}\], then

    A) \[0\in Q\]

    B) \[1\in Q\]

    C) \[2\in Q\]

    D) \[\frac{2}{3}\in Q\]

    Correct Answer: B

    Solution :

    Since \[B=\{2,\,3,\,5\}\] \ \[\frac{1}{y}\]can be 1,    [\[\because \] y can be 1].


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