JEE Main & Advanced Mathematics Sets Question Bank Relations

  • question_answer
    The relation R is defined on the set of natural numbers as {(a, b) : a = 2b}. Then \[{{R}^{-1}}\] is given by

    A) {(2, 1), (4, 2), (6, 3).....}

    B) {(1, 2), (2, 4), (3, 6)....}

    C) \[{{R}^{-1}}\] is not defined

    D) None of these

    Correct Answer: B

    Solution :

    R = {(2, 1), (4, 2), (6, 3),......}. So, \[{{R}^{-1}}\] = {(1, 2), (2, 4), (3, 6),.....}.


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