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    Question

    If тИЪr + (1/тИЪr) = 4, then find the value of r +

    (1/r).
    A 12 Correct Answer Incorrect Answer
    B 14 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 17 Correct Answer Incorrect Answer

    Solution

    Given, тИЪr + (1/тИЪr) = 4
    On squaring both the sides,
    So, r + (1/r) + 2 ├Ч тИЪr ├Ч (1/тИЪr) = 16
    Or, r + (1/r) + 2 = 16
    So, r + (1/r) = 14

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