$\sum\limits_{n = 1}^\infty {\frac{{^n{C_0} + ... + ^n{C_n}}}{{^n{P_n}}}} $ का मान क्या है?

  • A
    $e^2$
  • B
    $e$
  • C
    $e^2 - 1$
  • D
    $e - 1$

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$\frac{e^{7x} + e^x}{e^{3x}}$ के विस्तार में $x^n$ का गुणांक क्या है?

श्रेणी $\frac{2}{1!} + \frac{6}{2!} + \frac{12}{3!} + \frac{20}{4!} + \dots$ का योग क्या है?

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

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

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

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