New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If (a2  + 1/a2 ) = 66, then find

    the value of (a3  – 1/a3 ).
    A 536 Correct Answer Incorrect Answer
    B 478 Correct Answer Incorrect Answer
    C 522 Correct Answer Incorrect Answer
    D 534 Correct Answer Incorrect Answer

    Solution

    Since, (a 2  + 1/a 2 ) = 66

    So, a + 1/a = √(66 – 2) = 8

    So, (a 3  – 1/a 3 ) = 8 3  + 3 × 8 = 512 + 24 = 536

    Practice Next