यदि $\alpha = \int_0^1 \left(e^{9x + 3 \tan^{-1} x}\right) \left(\frac{12 + 9x^2}{1 + x^2}\right) dx$,जहाँ $\tan^{-1} x$ केवल मुख्य मान लेता है,तो $\left(\log_e |1 + \alpha| - \frac{3\pi}{4}\right)$ का मान है

  • A
    $6$
  • B
    $7$
  • C
    $8$
  • D
    $9$

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मान लीजिए $\alpha$ और $\beta$ $(\alpha < \beta)$ समीकरण $18x^2 - 9\pi x + \pi^2 = 0$,$f(x) = x^2$,और $g(x) = \cos x$ के मूल हैं। तो $\int_{\alpha}^{\beta} x (g \circ f(x)) dx =$

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