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)
Ghost.
Yes this functions are part of IIT JAM PHYSICS SYLLABUS but not rigorously, you just have to know the integration property of delta function and representation of density of point charges using delta function in emt. gamma functions are very important in quantum mechanics and you need to know there properties in order to solve integrations. Wishes.
and beta function?
not required but i am sure you encounter it in your bachelor's syllabus. wishes