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if S1, S2 and S4 are the sum of n, 2n and 4n terms respectively of an AP and d is the common difference, then value of S4 – (2S1 + S2) is |
| Answer» if S1, S2 and S4 are the sum of n, 2n and 4n terms respectively of an AP and d is the common difference, then value of S4 – (2S1 + S2) is | |