यदि $y = \frac{\sqrt{x^2 + 1} + \sqrt{x^2 - 1}}{\sqrt{x^2 + 1} - \sqrt{x^2 - 1}}$ है,तो $\frac{dy}{dx} = $

  • A
    $2x + \frac{2x^3}{\sqrt{x^4 - 1}}$
  • B
    $2x + \frac{x^3}{\sqrt{x^4 - 1}}$
  • C
    $x + \frac{2x^3}{\sqrt{x^4 - 1}}$
  • D
    इनमें से कोई नहीं

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यदि अंतराल $(a, b)$ में $f'(x)$ शून्य है,तो इस अंतराल में यह है

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$x = 1$ पर $y = (1 - x)(2 - x)...(n - x)$ का अवकलज क्या है?

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$f(x)$,$\mathbb{R}$ पर अवकलनीय है और $f^{\prime}(m) \neq 0, \,m \in \mathbb{R}$। यदि $\lim _{x \rightarrow m} \frac{x f(m)-m f(x)}{x-m}+f^{\prime}(m)=f(m)$,तो $m=$

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