Skip to content / Đến nội dung
ThichHocToan.com

IKMC 2020 - Grades 11-12 - Brazil Second Application - Self-study Question 7

IKMC · IKMC 2020 - Grades 11-12 - Brazil Second Application - Self-study

Question 7

Which number is divisible by 3 for every integer n?
  1. $5n+1$
  2. $n^2$
  3. $(n-3)^2$
  4. $n^2-1$
  5. $n^3-n$