PRMO 2018 Discussions

This topic contains 1 reply, has 2 voices, and was last updated by  saryu mehta 1 month, 4 weeks ago.

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  • #22208

    Ashani Dasgupta
    Keymaster

    The Pre RMO 2018 Problems are posted here:

    https://www.cheenta.com/pre-rmo-2018-solutions/

    You may post your solutions in this thread.

    #22260

    saryu mehta
    Participant

    sir, if by D alemberts ratio test, we get infinity, then the series is convergent or divergent?

    for eg: in 1/n! applying alembers test we get infinity>1 so it ois convergent.

    but on the other hand, the series like x+2x^2+3x^3……..to infinity is divergent if i apply the same test even though i am getting infinity in both of the cases.

    how it works?

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