Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Chandra prakash
After summation, running from 1 to n, term is : log (1+r²/n²).....and for better explanation see attached file by sir... I agree with divyansh sir... best regards
see this