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Let f(x) = x2+ ax + b, where a, b R. If f(x) = 0 has all its roots imaginary, then the roots of f(x) + f' (x) + f" (x) = 0 are (a) Real and distinct (b) Imaginary (c) Equal (d) Rational and equal
(b) imaginaryfor f(x)=0as roots r imaginary a2f(x)+f1(x)+f11(x)=0here discrimiant will be negative (a2-4b-2a-4)
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