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)
Shashi ranjan sinha
there exist atmost one real root....for the proof, see the attachment
there do exist such polynomial p such that between the consecutive roots of p' , there doesn't exist any root of p .... but in case of some polynomials p, between two consecutive roots of p', there exist a root of p, but atmost one only