## anonymous one year ago Which of the following is aub?

1. anonymous

|dw:1442378130630:dw|

2. anonymous

{0,1,3,6,8) {2,4} {0,1,2,3,4,6,8

3. anonymous

4. anonymous

@jim_thompson5910

5. jim_thompson5910

I'm guessing that the A is near the circle on the left, so it's the left circle set similar for B, but for the other circle A u B is the set of things in either A or B or both so just list everything in either circle or both circles

6. jim_thompson5910

|dw:1442292482543:dw|

7. jim_thompson5910

|dw:1442292498651:dw|

8. jim_thompson5910

the U stands for Union A u B means A or B

9. anonymous

its would be the last answer then? {0,1,2,3,4,6,8}

10. jim_thompson5910

yep

11. anonymous

Think you could help me with one more?

12. jim_thompson5910

sure

13. anonymous

A= {0,1,2,3,4};B={2,4,5,8} Which set is AUB? 2,4 0,1,3,6,8 1,2,3,6,8,

14. jim_thompson5910

wait, did you mean $$\LARGE A \cup B$$ or $$\LARGE A \cap B$$ ??

15. anonymous

I think its the second one! sorry..

16. jim_thompson5910

no worries what numbers are in BOTH sets at the same time?

17. anonymous

none?

18. anonymous

well 2 and 4?

19. jim_thompson5910

yeah so $$\LARGE A \cup B = \{2,4\}$$

20. jim_thompson5910

oops, wrong symbol I meant to say $$\LARGE A \cap B = \{2,4\}$$

21. anonymous

Whats the difference between the upside down U? Like what does it stand for?

22. jim_thompson5910

it means "intersection" it's the middle portion that the two circles overlap on |dw:1442293207823:dw|

23. anonymous

Oh thanks so much!

24. jim_thompson5910

so let's fill out the circles if A= {0,1,2,3,4};B={2,4,5,8} |dw:1442293257104:dw|

25. jim_thompson5910

A u B would be everything in either circle it's the A u B = A or B |dw:1442293297759:dw|

26. jim_thompson5910

basically you can pick any number from either set

27. jim_thompson5910

$\Large A \cap B = \text{ A and B}$ so the number has to be in BOTH |dw:1442293348446:dw|

28. anonymous

That sure makes it look easy! Thanks for the help")

29. jim_thompson5910

no problem