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) 
		 
			 
			 
			 
			 
			 
			 
			 
			 
			 
 30 points
 30 points >
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Suman Kumar
Find ist derivative. Equate the equation with zero. You will get a value for 'x' . Then again find 2nd derivative of the function. Substitute the value of 'x' . if 2nd derivative is less than zero then 'x' is a maxima for the function
is that we have to find out two times derivative of x
yes Arun