જો $y = \frac{\sqrt{a + x} - \sqrt{a - x}}{\sqrt{a + x} + \sqrt{a - x}}$ હોય,તો $\frac{dy}{dx} = $

  • A
    $\frac{ay}{x\sqrt{a^2 - x^2}}$
  • B
    $\frac{ay}{\sqrt{a^2 - x^2}}$
  • C
    $\frac{ay}{x\sqrt{x^2 - a^2}}$
  • D
    આમાંથી કોઈ નહીં

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