माना $n \in N$ के लिए $a_{n} = \int_{-1}^{n} \left(1 + \frac{x}{2} + \frac{x^{2}}{3} + \ldots + \frac{x^{n-1}}{n}\right) dx$ है। तो समुच्चय $\{n \in N : a_{n} \in (2, 30)\}$ के सभी अवयवों का योग $...........$ है।

  • A
    $8$
  • B
    $10$
  • C
    $5$
  • D
    $0$

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$\int_0^1 {{\cos }^{ - 1}}x\,dx = $

निश्चित समाकल की परिभाषा द्वारा,$\lim _{n \rightarrow \infty}\left(\frac{1^4}{1^5+n^5}+\frac{2^4}{2^5+n^5}+\frac{3^4}{3^5+n^5}+\ldots+\frac{n^4}{n^5+n^5}\right)$ का मान ज्ञात कीजिए।

मान लीजिए $f(x) = 2 + |x| - |x - 1| + |x + 1|$,$x \in R$. विचार करें:
$(S1): f^{\prime}\left(-\frac{3}{2}\right) + f^{\prime}\left(-\frac{1}{2}\right) + f^{\prime}\left(\frac{1}{2}\right) + f^{\prime}\left(\frac{3}{2}\right) = 4$
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तो,

यदि $\int_1^n [x] dx = 120$ है,तो $n = $

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