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AMO 2021 - Secondary 3 (Grade 9) Question 12

AMO · AMO 2021 - Secondary 3 (Grade 9)

Question 12

What is the product of all non-real roots of $x^4-16=0$?

Question illustration
  1. 4
  2. -4
  3. $4i$
  4. $-4i$
  5. 8