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SMO 2012 Senior Round 1 Question 1

SMO · SMO 2012 Senior Round 1

Question 1

Suppose $\alpha,\beta$ are the real roots of
$$x^2+2\sqrt{\sqrt2+1}\,x+\sqrt{\sqrt2+1}=0.$$
Find $\frac1{\alpha^3}+\frac1{\beta^3}$.
  1. $3\sqrt{\sqrt2+1}(\sqrt2-1)-8$
  2. $8-6\sqrt{\sqrt2+1}(\sqrt2-1)$
  3. $3\sqrt{\sqrt2+1}(\sqrt2-1)+8$
  4. $6\sqrt{\sqrt2+1}(\sqrt2-1)-8$
  5. None of the above.