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Black Book Advanced Problems in MathematicsMathematicsContinuity and Differentiability

If y = (x - 3)(x - 2)(x - 1)x(x + 1)(x + 2)(x + 3) , then d^2 y dx^2 at x = 1 is :

Options

  1. A-101
  2. B48
  3. C56
  4. D190

Correct answer

C. 56

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