समाकलन का मान ज्ञात कीजिए: $\int_0^{\pi /2} \frac{1 + 2\cos x}{(2 + \cos x)^2} dx$

  • A
    $\frac{\pi }{2}$
  • B
    $\pi $
  • C
    $\frac{1}{2}$
  • D
    इनमें से कोई नहीं

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Difficult
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$\int_{0}^{2} |x - 1| \, dx = $

$\int_{-1}^2 |x| \, dx =$

निश्चित समाकलन $\int_{1}^{\sqrt{3}} \frac{d x}{1+x^{2}}$ का मान ज्ञात कीजिए।

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