defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Binomial Theorem Special Terms of Binomial Expansion
Suppose A and B are the coefficients of 30th and 12th terms respectively in the binomial expansion of (1 + x)2n–1. If 2A = 5B, then n is equal to:
1
22
2
21
3
20
4
19