$1 + \frac{1 + 3}{2!} + \frac{1 + 3 + 5}{3!} + \frac{1 + 3 + 5 + 7}{4!} + \dots \infty = $

  • A
    $e/2$
  • B
    $e$
  • C
    $2e$
  • D
    $3e$

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Similar Questions

$\sum_{r=2}^{\infty} \frac{1+2+\dots+(r-1)}{r !}$ का मान ज्ञात कीजिए:

$\frac{a + bx + cx^2}{e^x}$ के विस्तार में,$x^n$ का गुणांक क्या है?

यदि $y = 1 + \frac{x}{1!} + \frac{x^2}{2!} + \frac{x^3}{3!} + \dots \infty$ है,तो $x = $

$\frac{1}{2} + \frac{1}{4} + \frac{1}{8 \times 2!} + \frac{1}{16 \times 3!} + \frac{1}{32 \times 4!} + \dots \infty = $

$\sum_{k=1}^{\infty} \frac{1}{k !} \left(\sum_{n=1}^k 2^{n-1}\right)$ का मान ज्ञात कीजिए।

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