In the expansion of \(\left(x + \frac{1}{x}\right)^{2n} \), what is the (n + 1)th term from the end (when arranged in descending powers of x) ?

1
C(2n, n)x
2
C(2n, n - 1)x
3
C(2n, n)
4
C(2n, n - 1)

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