Question

Please help me with this math!

Answer 1

9. (-∞, ∞)

10. (-∞, 3)U(3,∞)

11. (-∞, -3)U(-3,1)U(1, ∞)

12. (-∞,0)U(0,3)U(3, ∞)

13. (-∞,0)U(0,5)U(5, ∞)

14. (-∞,3)U(3, ∞)

15. (not sure)

16. [-4,0]U[0,4]U[4,∞)