engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Quadratic Equations Common Roots
Let γ, δ be real and z be a complex number. If z2 + γz + δ = 0 has two distinct roots on the line Re z = 1, then it is necessary that
1
δ ϵ (0, 1)
2
δ ϵ (-1, 0)
3
|δ| = 1
4
δ ϵ [1, ∞)