IIT JAM
Anku Asked a Question
October 2, 2020 9:39 pmpts 30 pts
  • IIT JAM
  • Mathematics (MA)

How to proceed further ....i got stuck in cos(1/n)/cos(1/n+1).

how to proceed further ...... . .. . . . . . .. . . . . . .. . . . ..
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  • Deepak singh Best Answer
    convergence of this series depends on x , so we will found R.O.C .
    Likes(0) Reply(10)
    Anku
    sir, i want to know one thing..if roc is finite then can we conclude series is convergent
  • Deepak singh thankyou
    see attached
    • cropped3626480160584318124.jpg
    Likes(1) Reply(1)
    Deepak singh
    this series is convergent only for x €(-1,1)
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