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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

The complete set of values of a for which the roots of the equation x^2 - 2|a+1|x + 1 = 0 are real is given by:

Options

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

Correct answer

A. (- , -2] [0, )

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