imo class 12 indefinite integration

Evaluate: ∫ dx / (x² + 2x + 2)

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Evaluate: ∫ dx / (x² + 2x + 2)

  • A. tan⁻¹(x+1) + C
  • B. log(x² + 2x + 2) + C
  • C. 1/2 tan⁻¹(x+1) + C
  • D. -1/(x+1) + C

Answer: A) tan⁻¹(x+1) + C

Explanation: Complete the square: x² + 2x + 2 = (x+1)² + 1. ∫ dx / ((x+1)² + 1) = tan⁻¹(x+1) + C.

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