Question

if Sn denotes n ters of A.P. whose common differece is d and ist term is a and find Sn-2Sn-1+Sn-2​

Answer 1

Answer:

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Explanation:

If Sn denotes n ters of A.P. whose common differece is d and ist term is a and find Sn-2Sn-1+Sn-2

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