જો $S = \sum\limits_{n = 0}^\infty \frac{(\log x)^{2n}}{(2n)!}$ હોય,તો $S$ =

  • A
    $x + x^{-1}$
  • B
    $x - x^{-1}$
  • C
    $\frac{1}{2}(x + x^{-1})$
  • D
    આમાંથી કોઈ નહીં

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