PRMO 2018 Discussions Math Olympiad, I.S.I. Entrance and College Mathematics › Forums › Math Olympiad, I.S.I., C.M.I. Entrance › PRMO 2018 Discussions This topic contains 1 reply, has 2 voices, and was last updated by saryu mehta 1 month, 4 weeks ago. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts August 19, 2018 at 1:59 pm #22208 Ashani DasguptaKeymaster The Pre RMO 2018 Problems are posted here: https://www.cheenta.com/pre-rmo-2018-solutions/ You may post your solutions in this thread. August 24, 2018 at 9:04 pm #22260 saryu mehtaParticipant 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? Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.