फलन $f(x) = \lim_{n \to \infty} \frac{x^{2n} - 1}{x^{2n} + 1}$ निम्नलिखित में से किस फलन के समान है?

  • A
    $g(x) = \text{sgn}(x - 1)$
  • B
    $h(x) = \text{sgn}(\tan^{-1}x)$
  • C
    $u(x) = \text{sgn}(|x| - 1)$
  • D
    $v(x) = \text{sgn}(\cot^{-1}x)$

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मान लीजिए $f(x) = \frac{x - 1}{2x^2 - 7x + 5}$. तो:

$\lim _{x \rightarrow 1} \frac{(2 x-3)(\sqrt{x}-1)}{2 x^2+x-3}$

दिए गए सीमा (limit) का मूल्यांकन करें: $\mathop {\lim }\limits_{x \to 0} \frac{ax + x \cos x}{b \sin x}$

$\lim\limits _{x \rightarrow 0} \frac{\cos (\sin x)-\cos x}{x^{4}}$ का मान ज्ञात कीजिए :

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