St(1)sud21 wrote:S0 =0, S10 =?
1) Si = i + Si-1
2) Si + Si-1 = i^2
S(i) = i + S(i-1)
S(1) = 1 + S(0) = 1
S(2) = 2 + 1 = 3
So on
We can find the vale of S(10)
SUFFICIENT
St(2)
Si + Si-1 = i^2
S(i) = i^2 -S(i-1)
S(1) = 1 - 0 = 1
S(2) = 4 - 1 = 3
so on
SUFFICIENT
Option D
But the ques is wrong with GMAT point of view, as tthe two statements give us two diff series
