$\int\limits_0^\infty {\frac{{{x^3}}}{{1 + x + 2{x^2} + 2{x^3} + {x^4} + {x^5}}}} dx$

  • A
    $\frac{{\pi - 2}}{2}$
  • B
    $\frac{{\pi - 1}}{2}$
  • C
    $\frac{{\pi - 2}}{4}$
  • D
    $\frac{{\pi - 1}}{4}$

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Difficult
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निश्चित समाकलनों के गुणों का उपयोग करके,$\int_{0}^{\frac{\pi}{2}} \frac{\sin x-\cos x}{1+\sin x \cos x} d x$ का मान ज्ञात कीजिए।

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