જો $\mathop {\lim }\limits_{x \to 0} \frac{{\log (3 + x) - \log (3 - x)}}{x} = k$ હોય,તો $k$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $-\frac{1}{3}$
  • C
    $\frac{2}{3}$
  • D
    $-\frac{2}{3}$

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ધારો કે $f: R \rightarrow R$ એ $x=0$ આગળ વિકલનીય છે. જો $f(0)=0$ અને $f'(0)=2$ હોય, તો $\lim _{x \rightarrow 0} \frac{1}{x} [f(x)+f(2 x)+f(3 x)+\ldots+f(2015 x)]$ ની કિંમત શોધો.

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આપેલ છે કે $f'(2) = 6$ અને $f'(1) = 4$,તો $\mathop {\lim }\limits_{h \to 0} \frac{{f(2h + 2 + {h^2}) - f(2)}}{{f(h - {h^2} + 1) - f(1)}} = $

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