Question

if S1, S2, S3 are the sums of n terms of 3 A.P.s whose first terms are same common differences are in A.P., then prove that S1,S2,S3 are also in A.P.​

Answer 1

Answer:

Sum of n terms of three A.P. are S

1

,S

2

,S

3

respectively. If first term of each progression is 1 and common differences are 1,2,3 respectively, then prove that: