$\frac{1}{3^{2}-1}+\frac{1}{5^{2}-1}+\frac{1}{7^{2}-1}+\ldots+\frac{1}{(201)^{2}-1}$ का मान ज्ञात कीजिए।

  • A
    $\frac{101}{404}$
  • B
    $\frac{25}{101}$
  • C
    $\frac{101}{408}$
  • D
    $\frac{99}{400}$

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श्रेणी का योग ज्ञात कीजिए: $1 \cdot 1! + 2 \cdot 2! + 3 \cdot 3! + \dots + n \cdot n!$

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यदि $a_n = \frac{-2}{4n^2 - 16n + 15}$ है,तो $a_1 + a_2 + \dots + a_{25}$ का मान ज्ञात कीजिए:

$\lim _{n \rightarrow \infty} \left( \sum_{k=1}^n \frac{k^3+6 k^2+11 k+5}{(k+3)!} \right)$ का मान क्या है?

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