Subject

    Bank Exam

    Topic

    Joint Recruitment Test for 7 Banks and 1 Financial Institutions - (Senior Officers/General) - 27.11.2021

    If x+1/x=3 then x-1/x=?

    ক)
    √5
    খ)
    √13
    গ)
    √7

    Explanation

    x+1/x=3 বা, (x+1/x)² =(3)² বা, (x-1/x)²+4.x.1/x=9 বা, (x-1/x)²+4=9 বা, (x-1/x)²=5 x-1/x=√5

    Find Tutors

    View all Tutors