Assignments on sets

Consider Set A = { 1, 4, 6, 7 }

B = { 1, 4 }

C = { 4 , 7}

D = { 7, 8, 9 }

1. What is A U B =

2. What is A intersection B =

3. What is A \ B ?

4. What is A intersection B intersection C

5. Is A intersection C = C ?

6. Is B intersection C subset of A ?

7. What is B \ C ?

8. What is C \ A ?

9. What is A \ ( B U C )

10. What is the power set of A ?

11. What is the power set of D ?

12. List the elements of the set

E = { x | x > 0 and x < 10 }

13. E = { 2, 4, 6, 8, 10, ... }

can you describe the set using the notation we used in question 12.

14. Give a example of a irrational numbers

15. What is the difference between rational and irrational number.