$\lim _{x}$ ${\rightarrow 1} \frac{(1-x)(1-x^2) \cdots (1-x^{2n})}{\{(1-x)(1-x^2) \cdots (1-x^n)\}^2} = \dots, \forall n \in N$

  • A
    $^{2n}P_n$
  • B
    $^{2n}C_n$
  • C
    $(2n)!$
  • D
    $\frac{(2n)!}{n!}$

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Similar Questions

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

$\lim _{x \rightarrow 0} \frac{a^x-1}{\sin (x)} = $

$\mathop {\lim }\limits_{x \to 0} \frac{{{{(1 + x)}^{1/x}} - e + \frac{1}{2}ex}}{{{x^2}}}$ का मान ज्ञात कीजिए।

Difficult
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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:

यदि $\mathop {\lim }\limits_{x \to 2} \frac{{{x^n} - {2^n}}}{{x - 2}} = 80$,जहाँ $n$ एक धनात्मक पूर्णांक है,तो $n = $

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