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Question

If the nth term of the sequence is given by (n2−1)(n+1) , then the sum of first n terms of the sequence is given by


A

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B

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C

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D

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Solution

The correct option is C


nth term of the sequence = (n21)(n+1)=n1

Sum of n terms =[n(n+1)2]n=[n(n1)2]


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