$\int \frac{dx}{\sqrt{x^2 + a^2}}$ का मान क्या है?

  • A
    $\frac{1}{2}x\sqrt{x^2 + a^2} + \frac{1}{2}a^2 \log |x + \sqrt{x^2 + a^2}| + c$
  • B
    $\frac{1}{2} \log |x^2 + a^2| + c$
  • C
    $\log |x + \sqrt{x^2 + a^2}| + c$
  • D
    $\log |x - \sqrt{x^2 + a^2}| + c$

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