श्रेणी $\frac{2}{3!} + \frac{4}{5!} + \frac{6}{7!} + \dots$ का मान क्या है?

  • A
    $e^{1/2}$
  • B
    $e^{-1}$
  • C
    $e$
  • D
    $e^{-1/3}$

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Similar Questions

श्रेणी $\frac{1^2}{1 \cdot 2!} + \frac{1^2 + 2^2}{2 \cdot 3!} + \frac{1^2 + 2^2 + 3^2}{3 \cdot 4!} + \dots + \frac{1^2 + 2^2 + \dots + n^2}{n(n + 1)!} + \dots \infty$ का योग किसके बराबर है?

$\frac{2}{3!} + \frac{4}{5!} + \frac{6}{7!} + \dots \infty = $

$\frac{1 \cdot 2}{1!} + \frac{2 \cdot 3}{2!} + \frac{3 \cdot 4}{3!} + \frac{4 \cdot 5}{4!} + \dots \infty = $

$1+\frac{1+2}{2 !}+\frac{1+2+2^2}{3 !}+\ldots$ का मान ज्ञात कीजिए।

$1 + \frac{2^3}{2!} + \frac{3^3}{3!} + \frac{4^3}{4!} + \dots \infty =$ ($e$ में)

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