ધારો કે $f(x) = \int_{1}^{x} \sqrt{2 - t^2} dt$. તો સમીકરણ $x^2 - f'(x) = 0$ ના વાસ્તવિક બીજ શોધો.

  • A
    $\pm 1$
  • B
    $\pm \frac{1}{\sqrt{2}}$
  • C
    $\pm \frac{1}{2}$
  • D
    $0$ અને $1$

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