If the sum of first n terms of an A.P. is $2 n^{2} - n + 1$ , then the tenth term of this A.P. is:

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Solution

The correct option is A
37

$t_{10} = S_{10} - S_{9} = 37$

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Sum of first n terms of an A.P is $2 n^{2}$ . Find its nth term.

2 n^{2} + 5 n