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+1 vote
asked in Mathematics by (49.6k points)

The sum of n, 2n,3n terms of an AP are S1, S2, aud S3, respectively. Prove that S3 = 3(S2 -S1).

1 Answer

+1 vote
answered by (157k points)
Best answer

Let a be the first term and d be the common difference of the AP

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