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      Question

      If (a2 + 1/a2) = 18, then find

      the value of (a3 - 1/a3).
      A 72 Correct Answer Incorrect Answer
      B 80 Correct Answer Incorrect Answer
      C 76 Correct Answer Incorrect Answer
      D 64 Correct Answer Incorrect Answer

      Solution

      Since, (a2 + 1/a2) = 18 So, a - 1/a = тИЪ {18 - 2} = 4 So, (a3 - 1/a3) = 43 + 3 * 4 = 64 + 12 = 76

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