यदि $a, b, c$ और $k$ शून्येतर वास्तविक संख्याएँ हैं और $\lim _{x \rightarrow \infty} x\left(a^{\frac{1}{x}}+b^{\frac{1}{x}}+c^{\frac{1}{x}}-3 k^{\frac{1}{x}}\right)=0$,तो $k=$

  • A
    $0$
  • B
    $(abc)^{1/3}$
  • C
    $(abc)^{-1/3}$
  • D
    $1$

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