$\lim _{x \rightarrow 0} \frac{\cos 2x - \cos 3x}{\cos 4x - \cos 5x} = $

  • A
    $\frac{5}{9}$
  • B
    $1$
  • C
    $\frac{3}{4}$
  • D
    $\frac{2}{5}$

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$\lim _{x \rightarrow 2} \frac{\sqrt{1+4 x}-\sqrt{3+3 x}}{x^3-8} = $

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$\mathop {\lim }\limits_{x \to 0} \left[ {\frac{{{e^x} - {e^{\sin x}}}}{{x - \sin x}}} \right]$ ની કિંમત શોધો.

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