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    Question

    If a = 55, then what is the value of is

    A 54 Correct Answer Incorrect Answer
    B 34 Correct Answer Incorrect Answer
    C 99 Correct Answer Incorrect Answer
    D 89 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Given,    =   [Using formula: (a-b)3 = a3 - b3 - 3ab(a-b)] =    = a-1 = 55 - 1 = 54

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