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Black Book Advanced Problems in MathematicsMathematicsContinuity and Differentiability

If y = x + e^x , then ( d^2 x dy^2 )_ x = 2 is :

Options

  1. A- 1 9
  2. B- 2 27
  3. C2 27
  4. D1 9

Correct answer

B. - 2 27

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