The sum of first \( n \) terms of an AP is \( \left(4 n^{2}+2 n\rig...

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The sum of first \( n \) terms of an AP is \( \left(4 n^{2}+2 n\right) \). The \( n \)th term of this AP is
(a) \( (6 n-2) \)
(b) \( (7 n-3) \)
(c) \( (8 n-2) \)
(d) \( (8 n+2) \)
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