$a>0, x \in R$ के लिए व्यंजक $\begin{aligned} & 1+x \log _e a+\frac{x^2}{2 !}\left(\log _e a\right)^2+\frac{x^3}{3 !}\left(\log _e a\right)^3+\ldots \end{aligned}$ किसके बराबर है?

  • A
    $a$
  • B
    $a^x$
  • C
    $a^{\log _e x}$
  • D
    $x$

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$\frac{1}{2!} + \frac{1+2}{3!} + \frac{1+2+3}{4!} + \ldots$ का मान ज्ञात कीजिए :

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

$\sum_{n=1}^{\infty} \frac{2n^2+n+1}{n!}$ का मान ज्ञात कीजिए।

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

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

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