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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 . If f(x) is non-negative x 0 then t lies in the interval

Options

  1. A[ 1 5 , 1 4 ]
  2. B[ 1 4 , )
  3. C[- 1 4 , 1 4 ]
  4. D[ 1 5 , ) ***

Correct answer

D. [ 1 5 , ) ***

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