જો $\mathop {\lim }\limits_{x \to 0} \frac{{\log (a + x) - \log a}}{x} + k\mathop {\lim }\limits_{x \to e} \frac{{\log x - 1}}{{x - e}} = 1$ હોય,તો

  • A
    $k = e\left( {1 - \frac{1}{a}} \right)$
  • B
    $k = e(1 + a)$
  • C
    $k = e(2 - a)$
  • D
    સમાનતા શક્ય નથી

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લક્ષની કિંમત શોધો: $\lim _{x \rightarrow 0} \frac{\sqrt{1+x \sin x}-\sqrt{\cos x}}{\tan ^2 \frac{x}{2}}$

$\mathop {{\rm{lim}}}\limits_{x \to 0} \frac{{\left( {1 - \cos 2x} \right)\left( {3 + \cos x} \right)}}{{x\tan 4x}} = $

જો $\alpha = \lim_{x \rightarrow 0^{+}} \left( \frac{e^{\sqrt{\tan x}} - e^{\sqrt{x}}}{\sqrt{\tan x} - \sqrt{x}} \right)$ અને $\beta = \lim_{x \rightarrow 0} (1 + \sin x)^{\frac{1}{2} \cot x}$ એ દ્વિઘાત સમીકરણ $ax^2 + bx - \sqrt{e} = 0$ ના બીજ હોય,તો $12 \log_e(a + b)$ ની કિંમત ............. થાય.

જો $[\cdot]$ એ મહત્તમ પૂર્ણાંક વિધેય દર્શાવતું હોય,તો $\lim _{x \rightarrow \frac{-3}{5}} \frac{1}{x}\left[\frac{-1}{x}\right]=$

$\lim _{\theta \rightarrow \frac{\pi}{2}^{-}} \frac{8 \tan ^4 \theta+4 \tan ^2 \theta+5}{(3-2 \tan \theta)^4} = $

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