If the sum of first n terms of an AP is 4n – n^2, what is the first term? What is the 10th and the nth term?

1 Answer

answered Mar 16, 2018 by santoshjha (25,550 points)
selected Mar 27, 2018 by Vikash Kumar

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If the sum of first n terms of an AP is 4n – n^2, what is the first term? What is the 10th and the nth term?

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