Given the first n terms of sequence {an} and Sn = an2 + BN (a, B ∈ R), and S25 = 100, then A12 + A14 equals () A. 16b. 8C. 4D. Uncertainty

Given the first n terms of sequence {an} and Sn = an2 + BN (a, B ∈ R), and S25 = 100, then A12 + A14 equals () A. 16b. 8C. 4D. Uncertainty

From the first n terms of the sequence {an} and Sn = an2 + BN (a, B ∈ R), we can get that the sequence {an} is an arithmetic sequence, S25 = (a1 + a25) · 252 = 100, the solution is a1 + a25 = 8, a1 + a25 = A12 + A14 = 8