Evaluate : x -1 x x +1 dx

Mathematics · JEE Advanced · NTA ExamsIntegral Calculus

Evaluate : \(\int \frac{\sqrt{\mathrm{x}-1}}{\mathrm{x} \sqrt{\mathrm{x}+1}} \mathrm{dx}\)
  1. \(\ln \left(\mathrm{x}+\sqrt{\mathrm{x}^{2}+1}\right)+\sec ^{-1} \mathrm{x}+\mathrm{c}\)
  2. \(\ln \left(\mathrm{x}-\sqrt{\mathrm{x}^{2}+1}\right)-\sec ^{-1} \mathrm{x}+\mathrm{c}\)
  3. \(\ln \left(\mathrm{x}+\sqrt{\mathrm{x}^{2}-1}\right)-\sec ^{-1} \mathrm{x}+\mathrm{c}\)
  4. None of these

Answer

(C) ( x + x ^ 2 -1 )- ^ -1 x + c

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