The sum of first n terms of a sequence is of the form an^2 + bn where a and b are constants independent of n. Show that the sequence is an AP.

Asked by Simran K | 23rd Feb, 2014, 01:22: PM

Expert Answer:

Consider the given equation of sum of n terms:
 
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Answered by  | 25th Feb, 2014, 09:11: AM

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