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Given positive integers r>1,n> 2, n bei...

Given positive integers `r>1,n> 2, n` being even and the coefficient of `(3r)th` term and `(r+ 2)th` term in the expansion of `(1 +x)^(2n)` are equal; find r

A

2r

B

2r-1

C

3r

D

r+1

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A
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