The sum of 19 terms of the series Sn= 4+10 + 26 + 66 + 162 + 386 + ...... is
Factorised form of p2 – 17p – 38 is
(a) (p – 19) (p + 2)
(b) (p – 19) (p – 2)
(c) (p + 19) (p + 2)
(d) (p + 19) (p – 2)