If the sum of the first n terms of an AP is 4n – n^2, what is the first term (that is S1)?

1 Answer

answered Mar 13, 2018 by sanjaydas (61,430 points)
selected Mar 15, 2018 by faiz

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If the sum of the first n terms of an AP is 4n – n^2, what is the first term (that is S1)?

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