For a sequence whose sum of the first terms is given by

MATHEMATICS · Single correct · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

For a sequence whose sum of the first

n

terms is given by

S_n = pn^2 + qn

, where

p

and

q

are constants, which of the following represents the common difference of the sequence? (a)

p+q

(b)

q

(c)

2p

(d)

3p+q