$\int\limits_1^{\sqrt 2 } {\frac{{{x^2} + 1}}{{{x^4} + 1}}} \,dx$ ની કિંમત શોધો:

  • A
    $\frac{1}{\sqrt{2}} \tan^{-1} \frac{1}{\sqrt{2}}$
  • B
    $\frac{1}{\sqrt{2}} \cot^{-1} 2$
  • C
    $\frac{1}{2} \tan^{-1} \frac{1}{2}$
  • D
    $\frac{1}{\sqrt{2}} \tan^{-1} 2$

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