If the sum of nnn terms of an AP is Sn=2n2+5nS_n = 2n^2 + 5nSn=2n2+5n, what is ana_nan?
4n+34n + 34n+3
4n+54n + 54n+5
2n+52n + 52n+5
4n+74n + 74n+7