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 
 
 
 
             
            

 
                
Abhishek tripathi 1![best-answer]() 
			
answer is b
cannot I prove it without using the polar coordinate?
yes you can proof by tending x and y to infinity one by one and check it is finite or infinity so as you tends x to infinity you get y which can be unbdd so f is unbounded