#### Question

If S_{n1} denotes the sum of first *n* terms of an A.P., prove that S_{12} = 3(S_{8} − S_{4}).

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Solution for question: If Sn1 denotes the sum of first n terms of an A.P., prove that S12 = 3(S8 − S4). concept: Sum of First n Terms of an AP. For the course CBSE