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The coefficient of (1)/(x) in the expans...

The coefficient of `(1)/(x)` in the expansion of
`(1+x)^(n) (1+(1)/(x))^(n)` is

A

`(n!)/((n-1)!(n+1)!)`

B

`((2n!))/((n-1)!(n+1)!)`

C

`((2n!))/((2n-1)!(2n+1)!)`

D

None of these

Text Solution

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The correct Answer is:
B
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