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HKIMO 2026 Grade 9 National Preliminary Set 01 Question 7

HKIMO · HKIMO 2026 Grade 9 National Preliminary Set 01

Question 7

Given $x>0$ and $x+1/x=9$, find $x^3+1/x^3$.
  1. 711
  2. 702
  3. 720
  4. 729