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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

The complete set of values of 'a' for which the inequality (a - 1) x^2 - (a + 1)x + (a - 1) 0 is true for all x 2 .

Options

  1. A( 3 7 , 1]
  2. B(- , 1)
  3. C(- , 7 3 ]
  4. D[ 7 3 , ) .

Correct answer

D. [ 7 3 , ) .

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