1.

Let the sum of n,2n, 3n terms of an A.P. be S1, S2and S3, respectively, show that S3 =3 (S2– S1)

Answer»

Let the sum of n,
2n, 3n terms of an A.P. be S1, S2
and S3, respectively, show that S3 =
3 (S2– S1)



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