Q19Multiple choice
Given the integers r > 1, n > 2, and coefficients of (3r) and (r + 2)nd terms in the binomial expansion of (1 + x)2n are equal, then
- (A)n = 2r
- (B)n = 3r
- (C)n = 2r + 1
- (D)none of these
Given the integers r > 1, n > 2, and coefficients of (3r) and (r + 2)nd terms in the binomial expansion of (1 + x)2n are equal, then