Given $f(x) = \frac{1}{2} - \tan^{-1}\left(\frac{\pi x}{2}\right)$ for $-1 < x < 1$ and $g(x) = \sqrt{3 + 4x - 4x^2}$. Find the domain of $(f + g)$.

  • A
    $ \left(-\frac{1}{2}, 1\right) $
  • B
    $ \left(-\frac{1}{2}, 1\right] $
  • C
    $ \left[-\frac{1}{2}, \frac{3}{2}\right] $
  • D
    $ (-1, 1) $

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