how can i prepare both abt IIT  and board examss   

 

even though i m not that much good in studiess....

 

but i can manage...  if u guide me??

if

,,  are the altitudes of a triangle abc and 2s denotes its perimeter then  raise to power -1+ raise to the power -1+ raise to the power -1 =??

 

 

 if S  be the sum,P the productand R the sum of reciprocals... of n terms in a G.P.

prove that

p2=(s/r)n  ;common ratio is not equal to 1

 

NOTE-      n is raise to the power (s/r)

i am really worried about my future..........

 

i want to really clear iit with good rank...

could anyone tell me is narayana corresponding course useful!!!!

 

also please tell me the best reference book for iit preparation for PCM

 

 

i would be very thankful if u reply soon..............................