Mathematics

Problem

S_r

denote the sum of first '

r

' terms of a non constant A.P and

\frac{S_a}{a^2} = \frac{S_b}{b^2} = c

, where

a, b, c

are distinct then

S_c =

(a)

c^2

(b)

c^3

(c)

c^4

(d)

abc