$\mathop {\lim }\limits_{x \to 0} \frac{{x + 2\sin x}}{{\sqrt {{x^2} + 2\sin x + 1} - \sqrt {{{\sin }^2}x - x + 1} }}$ का मान ज्ञात कीजिए।

  • A
    $2$
  • B
    $6$
  • C
    $3$
  • D
    $1$

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नीचे दो कथन दिए गए हैं:
कथन $I$: $\lim _{x \rightarrow 0} \left( \frac{\tan ^{-1} x + \log _e \sqrt{\frac{1+x}{1-x}} - 2x}{x^5} \right) = \frac{2}{5}$
कथन $II$: $\lim _{x \rightarrow 1} \left( x^{\frac{2}{1-x}} \right) = \frac{1}{e^2}$
उपरोक्त कथनों के आलोक में,नीचे दिए गए विकल्पों में से सही उत्तर चुनें:

$\lim _{n}$ ${\rightarrow \infty}\left[\left(\frac{1}{2 \cdot 3}+\frac{1}{2^2 \cdot 3}\right)+\left(\frac{1}{2^2 \cdot 3^2}+\frac{1}{2^3 \cdot 3^2}\right)+\ldots+\left(\frac{1}{2^n \cdot 3^n}+\frac{1}{2^{n+1} \cdot 3^n}\right)\right]$ का मान है

$\mathop {\lim }\limits_{x \to {0^ + }} {\left( {\sec \sqrt x } \right)^{\frac{{10}}{x}}}$ का मान ज्ञात कीजिए।

मान लीजिए $f(x) = \frac{x \cdot 2^x - x}{1 - \cos x}$ और $g(x) = 2^x \sin \left( \frac{\ln 2}{2^x} \right)$,तो:

$\lim _{x \rightarrow 0} \frac{x \tan 2x - 2x \tan x}{(1 - \cos 2x)^2} = $

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