Question

The sum of n terms of the three arithmetical progressions are S1, S2 and S3 . the first term of each is unity and the common differences are 1,2 and 3 respectively. Then
a) S1 + S3 = 2S2
b) S1 – S3 = S2
c) S1 + S2= S3
d) S1 + S3= S2
show your calculations.

Answer 1

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