Given that the sum of the first n terms of the arithmetic sequence {an} is Sn, and A3 + A8 = 13, S7 = 35, then A7=______ .

Given that the sum of the first n terms of the arithmetic sequence {an} is Sn, and A3 + A8 = 13, S7 = 35, then A7=______ .

∵ the sum of the first n terms of {an} is Sn, and A3 + A8 = 13, S7 = 35, ∵ 2A1 & nbsp; + 9D = 137a1 + 21d = 35, the solution is A1 = 2, d = 1, ∵ A7 = 2 + 6 × 1 = 8