Subject

    Bank Exam

    Topic

    Bangladesh Krishi Bank 2017 (Sr. Officer)

    What is the difference between sixth and fifth terms of the sequence 2,4,7, ___ whose nthterm is n + 2n-1

    ক)
    3
    খ)
    6
    গ)
    16
    ঘ)
    17

    Explanation

    here, an=n+2n−1 so, sixth term,  a6=6+26−1=38 fifth terms of the sequence,a5=5+25−1=21; The difference is 38-21=17.

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