$\int x \cdot \frac{\ln(x + \sqrt{1 + x^2})}{\sqrt{1 + x^2}} \, dx$ का मान ज्ञात कीजिए :

  • A
    $\sqrt{1 + x^2} \ln(x + \sqrt{1 + x^2}) - x + c$
  • B
    $\sqrt{1 + x^2} \ln(x + \sqrt{1 + x^2}) + x + c$
  • C
    $\sqrt{1 + x^2} \ln(x + \sqrt{1 + x^2}) + \frac{x}{\sqrt{1 + x^2}} + c$
  • D
    $\sqrt{1 + x^2} \ln(x + \sqrt{1 + x^2}) - \frac{x}{\sqrt{1 + x^2}} + c$

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