AIEEE
Exam
Let f(x) = x^2
+ ax + b; a, b ∈ R. If
f(1) + f(2) + f(3) = 0, then the roots of the
equation f(x) = 0
(A) are imaginary
(B) are real and equal
(C) are from the set {1, 2, 3}
(D) are real and distinct
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