defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Binomial Theorem Special Terms of Binomial Expansion
If the coefficients of rth, (r + 1)th and (r + 2)th terms in the expansion of (1 + x)n are in AP, then x is a root of the equation
1
x2 - x(4r + 1) + 4r2 - 2 = 0
2
x2 + x(4r + 1) + 4r2 - 2 = 0
3
x2 + x(4r + 1) + 4r2 + 2 = 0
4
None of the above