$\int_0^3 \frac{3x+1}{x^2+9} dx$ का मान ज्ञात कीजिए :

  • A
    $\log (2 \sqrt{2})+\frac{\pi}{12}$
  • B
    $\log (2 \sqrt{2})+\frac{\pi}{2}$
  • C
    $\log (2 \sqrt{2})+\frac{\pi}{6}$
  • D
    $\log (2 \sqrt{2})+\frac{\pi}{3}$

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