defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Binomial Theorem Binomial Expansion
If the coefficient of rth, (r + 1)th and (r + 2)th terms in the expansion of (1 + x)14 are in A.P., then the value of r is:
1
5 or 8
2
5 or 9
3
4 or 9
4
6 or 7