Sum Of The First n Terms Of An Arithmetic Progression
Sum Of The First n Terms Of An Arithmetic Progression The sum of first n terms of an A.P. is given by Sn = n/2 [2a + (n – 1) d] or Sn = n/2 [a + Tn] Note: (i) If sum of n terms Sn is given then general term Tn = Sn – Sn-1 where Sn-1 is sum …