If `S_1,S_2,S_3,………….S_n` denote the sum of 1,2,3…………n terms of an A.P. having first term a `and
Channel: Doubtnut
Date: 2020-04-12

If `S_1,S_2,S_3,………….S_n` denote the sum of 1,2,3…………n terms of an A.P. having first term a `and S_(kx)/S_x` is independent of x then `S_1+S_2+S_3+……..+S_n=` (A) `(n(n+1)(2n+1)a)/6` (B) `^(n+2)C_3a` (C) `^(n+1)C_3a` (D) none of these