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)
Shanu arora
here is the complete derivation of eqn 36,37 and 38 , just have to use Cp-Cv=R , also they can be derive individually , Always remember that you can take n=1 condition whenever there is not explicitly n mention in any of the equations . feel free for any doubts