$\lim _{x \rightarrow 1} \frac{x+x^2+\ldots+x^n-n}{x-1}$ ની કિંમત શોધો.

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

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Similar Questions

$\mathop {\lim }\limits_{x \to \infty } {\left( {\frac{{3x - 4}}{{3x + 2}}} \right)^{\frac{{x + 1}}{3}}}$ નું મૂલ્ય કેટલું થાય?

$x \rightarrow 0$ હોય ત્યારે $\left[\frac{1}{x^{2}}+\frac{(2013)^{x}}{e^{x}-1}-\frac{1}{e^{x}-1}\right]$ ની લક્ષ કિંમત શું થાય?

જો $l = \lim_{x \rightarrow 0} \frac{x}{|x| + x^2}$ હોય,તો $l$ ની કિંમત શું છે?

જો $a > 0$ હોય,$[\cdot]$ એ મહત્તમ પૂર્ણાંક વિધેય દર્શાવે છે,$\lim _{x \rightarrow a^{-}}\left(\frac{|x|^3}{a}-\left[\frac{x}{a}\right]^3\right)=k$,અને $\lim _{x \rightarrow a^{+}}\left(\frac{|x|^3}{a}-\left[\frac{x}{a}\right]^3\right)=l$,તો:

જો $\mathop {\lim }\limits_{n \to \infty } n \cos \left( \frac{\pi }{4n} \right) \sin \left( \frac{\pi }{4n} \right) = k$ હોય,તો $k$ ની કિંમત શોધો.

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