નિશ્ચિત સંકલન $\int_{1}^{\infty} (e^{x+1} + e^{3-x})^{-1} \, dx$ નું મૂલ્ય શોધો.

  • A
    $\frac{\pi}{4e^2}$
  • B
    $\frac{\pi}{4e}$
  • C
    $\frac{1}{e^2} \left( \frac{\pi}{2} - \tan^{-1} \frac{1}{e} \right)$
  • D
    $\frac{\pi}{2e^2}$

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