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HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 03 Question 9

HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 03

Question 9

Find the coefficient of $x^6$ in $(2x^2-1)^{10}$.
  1. 960
  2. $-960$
  3. $-64$
  4. 210