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VIT Engineering VIT Engineering Solved Paper-2007

  • question_answer
    In a group G = {1,3,7,9} under multiplication modulo 10, the inverse of 7 is :

    A)  7                

    B)  3

    C)  9                

    D)  1

    Correct Answer: B

    Solution :

    The identify element for multiplication modulo 10, is 1 and\[3{{X}_{10}}7=1.\] So, the inverse of 7 is 3.


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