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    Question

    If (x−1x)=23–√(x−1x)=23, what is the value of

    (x3+1x3) (x3+1x3) , given that x is a positive number?
    A 64 Correct Answer Incorrect Answer
    B 81 Correct Answer Incorrect Answer
    C 52 Correct Answer Incorrect Answer
    D 49 Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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