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

  • A
    $\frac{1}{2}[\log (x + \sqrt {1 + x^2})]^2 + c$
  • B
    $\log (x + \sqrt {1 + x^2})^2 + c$
  • C
    $\log (x + \sqrt {1 + x^2}) + c$
  • D
    इनमें से कोई नहीं

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