$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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