यदि $\alpha$ समीकरण $x^6-1=0$ का एक अवास्तविक मूल है,तो $\frac{\alpha^2+\alpha^3+\alpha^4+\alpha^5}{\alpha+1} = $

  • A
    $\alpha$
  • B
    $1$
  • C
    $0$
  • D
    $-1$

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