Suppose that f(n) = 2n² + n. Which of the following is true, and which is false?

1. f(n) is O(n). (FALSE)
2. f(n) is O(n²). (TRUE)
3. f(n) is O(n³). (TRUE)
4. f(n) is O(2ⁿ). (TRUE)
5. f(n) is Ω(n). (TRUE)
6. f(n) is Ω(n²). (TRUE)
7. f(n) is Ω(n³). (FALSE)
8. f(n) is Ω(2ⁿ). (FALSE)