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Grade: 12th pass
        
Let  f(x)  =  x
2
+  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 
5 years ago

Answers : (1)

Phani
51 Points
							
(b) imaginary
for f(x)=0
as roots r imaginary a2
f(x)+f1(x)+f11(x)=0
here discrimiant will be negative (a2-4b-2a-4)
4 years ago
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