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Let $f(x)=x^2+ax+b,$ where $a,b \in R$. If $f(x) =0$ has all its roots imaginary, then the roots of $f(x)+f'(x)+f''(x)=0$ are:

(1) real and distinct

(2) imaginary

(3) equal

(4) rational and equal

1 Answer

(2) imaginary
answered Nov 7, 2013 by pady_1
 
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