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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

If a and b are two distinct non-zero real numbers such that a - b = a b - 1 b - 1 a , then :

Options

  1. Aa > 0
  2. Ba < 0
  3. Cb < 0
  4. Db > 0 .

Correct answer

B. a < 0

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