Let sum of n, 2n, 3n terms of an A.P. be S1, S2 and S3 respectively, s – InterviewSolution

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1.	Let sum of n, 2n, 3n terms of an A.P. be S1, S2 and S3 respectively, show that S3=3(S2−S1)
Answer» Let sum of n, 2n, 3n terms of an A.P. be $S_{1}, S_{2}$ and $S_{3}$ respectively, show that $S_{3} = 3 (S_{2} - S_{1})$

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