$\frac{\frac{1}{2!} + \frac{1}{4!} + \frac{1}{6!} + \dots \infty}{1 + \frac{1}{3!} + \frac{1}{5!} + \frac{1}{7!} + \dots \infty} = $

  • A
    $\frac{e + 1}{e - 1}$
  • B
    $\frac{e - 1}{e + 1}$
  • C
    $\frac{e^2 + 1}{e^2 - 1}$
  • D
    $\frac{e^2 - 1}{e^2 + 1}$

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

$\frac{2}{2!} + \frac{2+4}{3!} + \frac{2+4+6}{4!} + \dots$ का मान ज्ञात कीजिए।

श्रेणी $\frac{1}{2!} - \frac{1}{3!} + \frac{1}{4!} - \dots$ का अनंत पदों तक योग ज्ञात कीजिए।

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$1 + x \log_e a + \frac{x^2}{2!} (\log_e a)^2 + \frac{x^3}{3!} (\log_e a)^3 + \dots = $

समीकरण $2 \cosh 2x + 10 \sinh 2x = 5$ का हल है

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