$\frac{1}{\sqrt{9}-\sqrt{8}} = ?$

  • A
    $\frac{1}{2}(3-2\sqrt{2})$
  • B
    $\frac{1}{3+2\sqrt{2}}$
  • C
    $3-2\sqrt{2}$
  • D
    $3+2\sqrt{2}$

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