$\mathop {\lim }\limits_{x \to 0} \left[ \frac{\sqrt{a + x} - \sqrt{a - x}}{x} \right]$ ની કિંમત શોધો.

  • A
    $1$
  • B
    $0$
  • C
    $\sqrt{a}$
  • D
    $1/\sqrt{a}$

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