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Black Book Advanced Problems in MathematicsMathematicsContinuity and Differentiability

Let f(x) = ||x^2 - 10x + 21| - p| ; then the exhaustive set of values of p for which f(x) has exactly 6 points of non-derivability, is :

Options

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

Correct answer

B. (0, 4)

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