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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

If the minimum value of the quadratic expression y = ax^2 + bx + c is negative attained at negative value of x , then :

Options

  1. Aa > 0
  2. Bb > 0
  3. Cc > 0
  4. DD > 0 (where D is discriminant).

Correct answer

A. a > 0

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