જો $y = \log \left[ \frac{x + \sqrt{x^2 + 25}}{\sqrt{x^2 + 25} - x} \right]$ હોય,તો $\frac{dy}{dx} = \dots$

  • A
    $\frac{1}{\sqrt{x^2 + 25}}$
  • B
    $\frac{2}{\sqrt{x^2 + 25}}$
  • C
    $\frac{-1}{\sqrt{x^2 + 25}}$
  • D
    $\frac{-2}{\sqrt{x^2 + 25}}$

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જો $y=2^{ax}$ અને $\left(\frac{dy}{dx}\right)_{x=1}=\log 256$ હોય,તો $a=$

$x$ ની સાપેક્ષે નીચેનાનું વિકલન કરો: $\log(\cos e^{x})$

જો $y=e^{\log _{e}\left[1+x+x^{2}+\ldots\right]}$ હોય,તો $\frac{d y}{d x}$ ની કિંમત શોધો.

વિકલન શોધો: $\frac{d}{dx}[(\log_e x)(\log_a x)]$

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