$\int \frac{1}{(x^2 - 1)\sqrt{x^2 + 1}} \, dx = $

  • A
    $\frac{1}{2\sqrt{2}} \log \left\{ \frac{\sqrt{1 + x^2} + x\sqrt{2}}{\sqrt{1 + x^2} - x\sqrt{2}} \right\} + c$
  • B
    $\frac{1}{2\sqrt{2}} \log \left\{ \frac{\sqrt{1 + x^2} - \sqrt{2}}{\sqrt{1 + x^2} + \sqrt{2}} \right\} + c$
  • C
    $\frac{1}{2\sqrt{2}} \log \left\{ \frac{\sqrt{1 + x^2} - x\sqrt{2}}{\sqrt{1 + x^2} + x\sqrt{2}} \right\} + c$
  • D
    इनमें से कोई नहीं

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