$\mathop {\lim }\limits_{x \to 1} {\left( {\frac{4}{\pi }{{\tan }^{ - 1}}x} \right)^{\frac{1}{{({x^2} - 1)}}}}$ का मान ज्ञात कीजिए।

  • A
    $-\frac{1}{\pi}$
  • B
    $\frac{1}{\pi}$
  • C
    $e^{-\frac{1}{\pi}}$
  • D
    $e^{\frac{1}{\pi}}$

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