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Black Book Advanced Problems in MathematicsMathematicsContinuity and Differentiability

If f(x) = ⁻¹ ( sgn (x^2 - x + 1)) has exactly one point of discontinuity, then the value of can be :

Options

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

Correct answer

C. 2

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