यदि $S = \frac{1}{1 \times 2} - \frac{1}{2 \times 3} + \frac{1}{3 \times 4} - \frac{1}{4 \times 5} + \dots + \infty$ है,तो $e^S = $

  • A
    $\log_e \left( \frac{4}{e} \right)$
  • B
    $\frac{4}{e}$
  • C
    $\log_e \left( \frac{e}{4} \right)$
  • D
    $\frac{e}{4}$

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Similar Questions

$e^{\left( {x - \frac{1}{2}{(x - 1)}^2 + \frac{1}{3}{(x - 1)}^3 - \frac{1}{4}{(x - 1)}^4 + \dots} \right)}$ का मान क्या है?

$\frac{(a - 1) - \frac{(a - 1)^2}{2} + \frac{(a - 1)^3}{3} - \dots \infty}{(b - 1) - \frac{(b - 1)^2}{2} + \frac{(b - 1)^3}{3} - \dots \infty} = $

$\frac{1}{2} - \frac{1}{2 \cdot 2^2} + \frac{1}{3 \cdot 2^3} - \frac{1}{4 \cdot 2^4} + \ldots$ का मान ज्ञात कीजिए।

यदि $\log (1 - x + {x^2}) = {a_1}x + {a_2}{x^2} + {a_3}{x^3} + \dots$ है,तो ${a_3} + {a_6} + {a_9} + \dots$ का मान ज्ञात कीजिए।

यदि $0 < y < 2^{1/3}$ और $x(y^3 - 1) = 1$ है,तो $\frac{2}{x} + \frac{2}{3x^3} + \frac{2}{5x^5} + \dots$ का मान ज्ञात कीजिए:

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