If one root of the quadratic equation $ax^2 + bx + c = 0$ is equal to the $n^{th}$ power of the other root,then the value of $(ac^n)^{\frac{1}{n+1}} + (a^nc)^{\frac{1}{n+1}} = $

  • A
    $b$
  • B
    $-b$
  • C
    $b^{\frac{1}{n+1}}$
  • D
    $-b^{\frac{1}{n+1}}$

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