The sum of n terms of the infinite serie...

The sum of n terms of the infinite series `1cdot3^2+ 2cdot5^2+3cdot7^2+….infty` is

A

`n/6(n+1)(6n^2+14n+7)`

B

`n/6(n+1)(2n+1)(3n+1)`

C

`4n^3+4n^2+n`

D

None of the above

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Verified by Experts

The correct Answer is:

A

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