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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

Let a, b and c be the roots of x^3 - x + 1 = 0 , then the value of ( 1 a+1 + 1 b+1 + 1 c+1 ) equals to:

Options

  1. A1
  2. B-1
  3. C2
  4. D-2.

Correct answer

D. -2.

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