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## If Sn, denotes the sum of first n terms of an AP prove that S12 = 3(S8 - S4). Mathematics CBSE class 10 2015

If Sn, denotes the sum of first n terms of an AP prove that S12 = 3(S8 - S4).By:tarun101

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## Answers

Given,

S

_{n}is sum of the first ‘n’ terms of an A.PLet ‘a’ be the first term and ‘d’ be the common difference of the given A.P

Then,

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