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)
Karan kailash jadhav
i have also have this solution in my notes
solve by variations of perameter
ok i will try by that method
what about D^2=-a^2
D=±ai
ok thank you