यदि $y = \log \left( \frac{1 + \sqrt{x}}{1 - \sqrt{x}} \right)$ है,तो $\frac{dy}{dx} = $

  • A
    $\frac{\sqrt{x}}{1 - x}$
  • B
    $\frac{1}{\sqrt{x}(1 - x)}$
  • C
    $\frac{\sqrt{x}}{1 + x}$
  • D
    $\frac{1}{\sqrt{x}(1 + x)}$

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यदि $\frac{d}{dx} \left( A \log \left( \frac{\sqrt{1-x^3}-1}{\sqrt{1-x^3}+1} \right) \right) = \frac{1}{x \sqrt{1-x^3}}$ है,तो $AB=$

यदि $y=e^{\log _{e}\left[1+x+x^{2}+\ldots\right]}$ है,तो $\frac{d y}{d x}$ का मान ज्ञात कीजिए।

$\frac{d}{dx} [\log(\cos x)]$

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