Subject

    Bank Exam

    Topic

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

    The inverse of f(x)=2x-1 is

    ক)
    (x-1)/2
    খ)
    (x+1)/2
    গ)
    2x-1
    ঘ)
    2x+1

    Explanation

    দেওয়া আছে , f(x)=2x-1 ধরি, y=f(x) y=2x-1 ⇒ 2x-1=y ⇒ 2x=y+1 ⇒ x=(y+1)/2 ⇒  f -1 (y)=(y+1)/2 [∴ y=f(x) f -1 (y)=x] so, f -1 (x)=(x+1)/2

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