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If r gt 1, n gt2 are positive integers a...

If `r gt 1, n gt2` are positive integers and the coefficients of `(r+2)` th and 3rd terms in the expansion of `(1+x)^(2n)` are equal, then n is equal to-

A

3r

B

`1/2(r+3)`

C

2r

D

`2r+1`

Text Solution

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The correct Answer is:
C
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