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If x^(r ) occurs in the expansions of ...

If `x^(r )` occurs in the expansions of `(x+(1)/(x))^(n)` then its coefficient is

A

`(n!)/(r!)^(2)`

B

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

C

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

D

`(n!)/([(r )/(2)!]^(2)`

Text Solution

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The correct Answer is:
C
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MODERN PUBLICATION-MOCK TEST PAPER -IV-SELECT THE CORRECT ANSWER
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