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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

Paragraph: **** Let f(x) = ax^2 + bx + c, a 0 , such that f(-1-x) = f(-1+x) x R . Also given that f(x) = 0 has no real roots and 4a + b > 0 . The set of all values of m for which the equation has real roots is :

Options

  1. A(- , 0)
  2. B(0, )
  3. C[1, )
  4. D(- , )

Correct answer

D. (- , )

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