$\int_{0}^{\infty} \frac{x \, dx}{(1 + x)(1 + x^2)} = $

  • A
    $0$
  • B
    $\pi / 2$
  • C
    $\pi / 4$
  • D
    $1$

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यदि $\int_0^3 (3x^2 - 4x + 2) dx = k$ है, तो $3x^2 - 4x + 2 = \frac{3k}{5}$ का एक पूर्णांक मूल क्या है?

सिद्ध कीजिए कि $\int_{1}^{3} \frac{dx}{x^{2}(x+1)} = \frac{2}{3} + \log \frac{2}{3}$.

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