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...

Question

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

Accepted Answer

(B)

JEE Main Mathematics question