$1 + \frac{(\log_e n)^2}{2!} + \frac{(\log_e n)^4}{4!} + \dots = $

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

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Similar Questions

श्रेणी $x \log _e a + \frac{x^3}{3!} (\log _e a)^3 + \frac{x^5}{5!} (\log _e a)^5 + \dots$ का मान क्या है?

यदि $-\frac{\pi}{2} < \theta < \frac{\pi}{2}$ है,तो $\log \left(\tan \left(\frac{\pi}{4}+\frac{\theta}{2}\right)\right)=$

$\frac{1}{x + 1} + \frac{1}{2(x + 1)^2} + \frac{1}{3(x + 1)^3} + \dots \infty = $

यदि $P = 1 + \frac{1}{2 \times 2} + \frac{1}{3 \times 2^{2}} + \dots$ और $Q = \frac{1}{1 \times 2} + \frac{1}{3 \times 4} + \frac{1}{5 \times 6} + \dots$ है, तो

यदि $|a| < 1$ और $b = \sum_{k=1}^{\infty} \frac{a^k}{k}$ है,तो $a$ का मान क्या होगा?

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