# If xp occurs in the expansion of (x2 + 1/x)2n, then prove that its coefficient is (2n)!/(4n-p/3)!(2n+p/3)!.

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If xp occurs in the expansion of (x2 + 1/x)2n, then prove that its coefficient is (2n)!/(4n-p/3)!(2n+p/3)!.

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