If the coefficient of the middle term in the expansion of `(1+x)^(2n+2)i salpha` and the coefficients of middle terms in the exp

If the coefficient of the middle term in the expansion of `(1+x)^(2n+2)i salpha` and the coefficients of middle terms in the expansion of `(1+x)^(2n+1)` are `beta` and `gamma` then relate `alpha,betaa n dgammadot`
A. `P + q = r`
B. `p+ r = 0`
C. ` p = q +r `
D. ` p + q + r = 0`

If the coefficient of the middle term in the expansion of `(1+x)^(2n+2)i salpha` and the coefficients of middle terms in the expansion of `(1+x)^(2n+1

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