$\int \frac{x}{x^4 + x^2 + 1} dx$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{3} \tan^{-1} \left( \frac{2x^2 + 1}{3} \right)$
  • B
    $\frac{1}{\sqrt{3}} \tan^{-1} \left( \frac{2x^2 + 1}{\sqrt{3}} \right)$
  • C
    $\frac{1}{\sqrt{3}} \tan^{-1} (2x^2 + 1)$
  • D
    इनमें से कोई नहीं

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