engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Binomial Theorem Special Terms of Binomial Expansion
If the coefficient of the middle term in the expansion of (1 + x)2n + 2 is p and the coefficients of middle terms in the expansion of (1 + x)2n + 1 are q and r, then
1
p + q = r
2
p + r = q
3
p = q + r
4
p + q + r = 0