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    Question

    If x + (1/x) = 9 then x2 + 1/x2 =

    ?
    A 75 Correct Answer Incorrect Answer
    B 65 Correct Answer Incorrect Answer
    C 79 Correct Answer Incorrect Answer
    D 45 Correct Answer Incorrect Answer

    Solution

    If x + (1/x) = N  Then Squaring both the sides, x2 + (1/x2) + 2 = N2  x 2 + (1/x 2) = N2 - 2 = 92 - 2 = 79 ` `

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