Let $f(x) = \mathop {\lim }\limits_{n \to \infty } \frac{{{{\left( {2\sin x} \right)}^{2n}}}}{{{3^n} - {{\left( {2\cos x} \right)}^{2n}}}}; n \in Z$,$x \ne m\pi \pm \frac{\pi }{6}; m \in Z$ and $f\left( {m\pi \pm \frac{\pi }{6}} \right) = 0$. Then which of the following is true?

  • A
    $f(x)$ is discontinuous at $x = m\pi \pm \frac{\pi }{6}; m \in Z$
  • B
    $f\left( {\frac{\pi }{3}} \right) = 1$
  • C
    $f(0) = 0$
  • D
    All the above statements are correct.

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