$a^{1/3} + a^{-1/3}$ का परिमेयकारी गुणक (rationalising factor) क्या है?

  • A
    $a^{1/3} - a^{-1/3}$
  • B
    $a^{2/3} + a^{-2/3}$
  • C
    $a^{2/3} - a^{-2/3}$
  • D
    $a^{2/3} + a^{-2/3} - 1$

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