ધારો કે $f(x) = \int \frac{\sqrt{x}}{(1+x)^2} dx$ $(x \geq 0)$ છે. તો $f(3) - f(1)$ ની કિંમત શોધો.

  • A
    $-\frac{\pi}{6} + \frac{1}{2} + \frac{\sqrt{3}}{4}$
  • B
    $\frac{\pi}{6} + \frac{1}{2} - \frac{\sqrt{3}}{4}$
  • C
    $-\frac{\pi}{12} + \frac{1}{2} + \frac{\sqrt{3}}{4}$
  • D
    $\frac{\pi}{12} + \frac{1}{2} - \frac{\sqrt{3}}{4}$

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