If Sn denotes the sum of the first n terms of an A.P., prove that S12=

1.	If Sn denotes the sum of the first n terms of an A.P., prove that S12=3(S8-S4).
Answer» Yaa I know See in oswaal sample paper very easy sum ?? Accha Are mujhe v aata h pr mai jaankar puchi Yha pr kese kre.. easy toh hai itna..

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