$\lim _{x \rightarrow 1} \left( \frac{x+x^2+x^3+\ldots+x^n-n}{x-1} \right) = $

  • A
    $\frac{n(n+1)}{2}$
  • B
    $\frac{n+1}{2}$
  • C
    $\frac{2}{n}$
  • D
    $n$

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यदि $f(x) = \begin{cases} \frac{\sin([x])}{[x]}, & \text{जब } [x] \neq 0 \\ 0, & \text{जब } [x] = 0 \end{cases}$ जहाँ $[x]$ महत्तम पूर्णांक फलन है,तो $\lim_{x \to 0} f(x) = $

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अभिकथन $(A)$: $\lim _{x \rightarrow 0} \frac{1}{x} = \infty$
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दी गई सीमा का मूल्यांकन करें: $\mathop {\lim }\limits_{x \to 1} \frac{4x+3}{x-2}$

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