मान लीजिए कि $\int_\alpha^{\log _e 4} \frac{dx}{\sqrt{e^{x}-1}}=\frac{\pi}{6}$. तो $e^\alpha$ और $e^{-\alpha}$ किस समीकरण के मूल हैं:

  • A
    $2 x^2-5 x+2=0$
  • B
    $x^2-2 x-8=0$
  • C
    $2 x^2-5 x-2=0$
  • D
    $x^2+2 x-8=0$

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$\int_{8}^{18} \frac{1}{(x+2) \sqrt{x-3}} \, dx = $

$\int_0^{\pi /2} \frac{\sin x \cos x}{1 + \sin^4 x} \, dx = $

$\int_{\log _e 2}^x \frac{d t}{\sqrt{e^t-1}}=\frac{\pi}{6} \Rightarrow x=$

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