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Black Book Advanced Problems in MathematicsMathematicsContinuity and Differentiability

If y = 1 + ( 1 x - ) + /x ( 1 x - ) ( 1 x - ) + /x^2 ( 1 x - ) ( 1 x - ) ( 1 x - ) , then dy dx is :

Options

  1. Ay ( - x + - x + - x )
  2. By x ( 1/x - + 1/x - + 1/x - )
  3. Cy ( 1/x - + 1/x - + 1/x - )
  4. Dy x ( /x 1/x - + /x 1/x - + /x 1/x - )

Correct answer

B. y x ( 1/x - + 1/x - + 1/x - )

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