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Black Book Advanced Problems in MathematicsMathematicsIndefinite and Definite Integration

( x^2 - x + 1 x^2 + 1 ) e^ ⁻¹(x) dx = f(x) e^ ⁻¹(x) + C where C is constant of integration. Then f(x) is equal to :

Options

  1. A-x
  2. B1-x
  3. Cx
  4. D1+x

Correct answer

C. x

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