If the sum of n terms of an A.P. is (pn + qn^2), where p and q are constants, find the common difference.

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answered Jan 14, 2017 by vikash (21,277 points)
selected Jan 14, 2017 by Rohit Singh

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If the sum of n terms of an A.P. is (pn + qn^2), where p and q are constants, find the common difference.

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