समाकलन ज्ञात कीजिए: $\int \sqrt{x^2+4x+1} \, dx = \text{ . . . . . . } + C$.

  • A
    $\frac{x+2}{2} \sqrt{x^2+4x+1} - \frac{3}{2} \log \left|x+2+\sqrt{x^2+4x+1}\right|$
  • B
    $\frac{x+2}{2} \sqrt{x^2+4x+1} + \frac{3}{2} \log \left|x+2+\sqrt{x^2+4x+1}\right|$
  • C
    $\frac{x+2}{2} \sqrt{x^2+4x+1} - 9 \log \left|x+2+\sqrt{x^2+4x+1}\right|$
  • D
    $\frac{x+2}{2} \sqrt{x^2+4x+1} + 9 \log \left|x+2+\sqrt{x^2+4x+1}\right|$

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