જો $f(x) = \cot^{-1}\left(\frac{x^x - x^{-x}}{2}\right)$ હોય,તો $f'(1)$ ની કિંમત કેટલી થાય?

  • A
    -$1$
  • B
    $1$
  • C
    -$2$
  • D
    $2$

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જો $f(1) = 3$ અને $f'(1) = 2$ હોય,તો $x = 0$ આગળ $\frac{d}{dx} \{ \log f(e^x + 2x) \}$ ની કિંમત શોધો.

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