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    Question

    If x + (1/x) = 3, then x2 + (1/x2)

    will be –
    A 9 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 27 Correct Answer Incorrect Answer
    D 7 Correct Answer Incorrect Answer

    Solution

    x + (1/x) = 3 ⇒ (x + 1/x) ² = (3)² ⇒ x2 + 1/x2+ 2 = 9 ∴ x2 + 1/x2 + 2 = 9 – 2 = 7

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