New Enroll here to Join NaBFID Analyst Into Class on May 6

    Question

    src="https://www.ixambee.com/questionimage/Railway-Protection-Force-(RPF)-Constable/1722319556-67.JPG" alt="" />
    A 123 Correct Answer Incorrect Answer
    B 129 Correct Answer Incorrect Answer
    C 119 Correct Answer Incorrect Answer
    D 14 Correct Answer Incorrect Answer

    Solution

    x -1/x =3 both sides squaring – x2+1/x2 =9+2 =11. x2+1/x2 =11                        both sides Squaring... x4+1/x4 =112 -2 =121 -2   =119

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