jesseabney 3 years ago If A = {negative even integers} and B = {negative odd integers}, what is A U B? Answer {negative integers} { } {integers} {0}

1. jagatuba

That would be the union of set A and set B wouldn't it?

2. jesseabney

yes

3. jesseabney

thats the question

4. jagatuba

Right but union in math really just means the same thing as it does in English 'to join'.

5. jagatuba

What do you get when you join A and B?

6. jesseabney

integers

7. jagatuba

what kind of integers?

8. jesseabney

positive

9. jagatuba

Why positive?

10. jesseabney

- and - = +

11. jagatuba

This true if you are multiplying. IS that what is being done?

12. jesseabney

i quit lol

13. jagatuba

No don't quit

14. jagatuba

YOu almost got it

15. jagatuba

Think of it like this A U B is like saying A joined with B. If A was a set of red marbles and B was a set of blue marbles what would the set of A U B consist of?

16. jesseabney

blue and red

17. jagatuba

Correct. Joining them does not change their form to purple or something. We still have red and blue marbles. So apply that to a small set of numbers A={1,3,5} and B={2,4,6}. Now what is A U B?

18. jesseabney

123456

19. jagatuba

Right now expand that to a larger set A={all even numbers} and B={all odd numbers}. Now what is A U B?

20. jesseabney

123456789 ...ect.

21. jagatuba

Right or {all numbers}. Now just apply the appropriate terminaology (i.e. that used in your question), and you have your answer.

22. jagatuba

If A={negative even integers} and B={negative odd integers} what does A U B contain?