Given positive integers r gt 1, n gt 2 a...

Given positive integers `r gt 1, n gt 2` and that the coefficient of `(3rd)th` and `(r+2)th` terms in the binomial expansion of `(1+x)^(2n)` are equal. Then (a) `n=2r` (b) `n=2r+1` (c) `n=3r` (d) non of these

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