Two marks exercise problems VIII — task. Mathematics State Board, Class 10.

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Find the \(n^{\text{th}}\) term of the following sequence.

\(2\), \(5\), \(10\), \(17\), ...

$n^{2} - 1$
$n + 1$
$n^{2} + 1$
$2 n^{2} + 1$

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