જો $y = f \left( \frac{2x - 1}{x^2 + 1} \right)$ અને $f'(x) = \sin x$ હોય,તો $\frac{dy}{dx} = $

  • A
    $\frac{1 + 2x - x^2}{(1 + x^2)^2} \sin \left( \frac{2x - 1}{x^2 + 1} \right)$
  • B
    $\frac{2(1 + x - x^2)}{(1 + x^2)^2} \sin \left( \frac{2x - 1}{x^2 + 1} \right)$
  • C
    $\frac{1 - x + x^2}{(1 + x^2)^2} \sin \left( \frac{2x - 1}{x^2 + 1} \right)$
  • D
    આમાંથી કોઈ નહીં

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