Math, asked by sri288, 11 months ago

if Sn denotes the sum of n terms of an AP whose common difference is d and 1st term is a. Find Sn – 2Sn – 1 + Sn – 2 . ,,, don't spam if u do so the answer and the account will be reported for sure... ​

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Answered by yokeshgopal3
1

Step-by-step explanation:

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Answer:

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