$\int \frac{x^2+1}{x^4-x^2+1} \, dx =$

  • A
    $\tan^{-1}\left(\frac{x^2+1}{2}\right) + c$
  • B
    $\tan^{-1}(x^2) + c$
  • C
    $\tan^{-1}(2x^2-1) + c$
  • D
    $\tan^{-1}\left(\frac{x^2-1}{x}\right) + c$

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वास्तविक संख्याओं $\alpha, \beta, \gamma$ और $\delta$ के लिए,यदि $\int \frac{\left(x^{2}-1\right)+\tan ^{-1}\left(\frac{x^{2}+1}{x}\right)}{\left(x^{4}+3 x^{2}+1\right) \tan ^{-1}\left(\frac{x^{2}+1}{x}\right)} d x =\alpha \log _{e}\left(\tan ^{-1}\left(\frac{x^{2}+1}{x}\right)\right) +\beta \tan ^{-1}\left(\frac{\gamma\left(x^{2}-1\right)}{x}\right)+\delta \tan ^{-1}\left(\frac{x^{2}+1}{x}\right)+C$ जहाँ $C$ एक स्वेच्छ अचर है,तो $10(\alpha+\beta \gamma+\delta)$ का मान ....... है।

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यदि $\int \frac{\sin ^8 x-\cos ^8 x}{1-2 \sin ^2 x \cos ^2 x} d x=A \sin 2 x+B$ है,तो $A$ का मान ज्ञात कीजिए।

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