$ \int \frac{2 x^2-1}{x^4-x^2-20} d x $

  • A
    $\frac{1}{\sqrt{5}} \log \left|\frac{x+\sqrt{5}}{x-\sqrt{5}}\right|+\tan ^{-1}\left(\frac{x}{2}\right)+c$
  • B
    $\frac{1}{2 \sqrt{5}} \log \left|\frac{x+\sqrt{5}}{x-\sqrt{5}}\right|+\tan ^{-1}\left(\frac{x}{2}\right)+c$
  • C
    $\frac{1}{2 \sqrt{5}} \log \left|\frac{x-\sqrt{5}}{x+\sqrt{5}}\right|+\frac{1}{2} \tan ^{-1}\left(\frac{x}{2}\right)+c$
  • D
    $\frac{1}{2} \log \left|\frac{x-\sqrt{5}}{x+\sqrt{5}}\right|+\frac{1}{2} \tan ^{-1}\left(\frac{x}{2}\right)+c$

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$\int \frac{x^{2}+1}{(x-3)(x-2)} d x = P x + Q \log |x-3| + R \log |x-2| + c$,जहाँ $c$ समाकलन का स्थिरांक है,तो $P, Q, R$ के मान क्रमशः क्या होंगे?

समाकल $\int \frac{dx}{\sin^2 x + \tan^2 x}$ का मान है...

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