find

Asked by  | 10th Nov, 2008, 01:40: PM

Expert Answer:

Sn=(pn+qn2)

S1=(p.1+q.12) =p+q = a 1

S2 = (p2+q22) =2p+4q= a 1 + a2

a 2 = = S2 - S1 = p + 3q

d = a2 - a1=(p + 3 q) -(p+q) = 2q

Answered by  | 10th Nov, 2008, 06:43: PM

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