UPSC NDA Math Model Paper 8

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Question : 102 of 120

Marks: +1, -0

Find the sum of the series whose nth term is n(n+2) ?

n.(n−1).(2n−5)
6
n.(n−1).(2n−7)
6
n.(n+1).(2n+7)
6
n.(n+1).(2n+5)
6

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