If Sn be the sum of n terms of an A.P the value of Sn minus 2sn-1 plus Sn-2 is
1)d
2)d square
3)cannot be calculated
4)None of these
Thanks in advance
If Sn be the sum of n terms of an A.P the value of Sn minus 2sn-1 plus Sn-2 is
1)d
2)d square
3)cannot be calculated
4)None of these
Thanks in advance
sn - 2sn-1+sn-2
= -3 that is calculatedtherefore,answer is 4).none .
CAclubindia
