## anonymous 3 years ago Find A u B and A (upside down u sign) B for Set A and B A= {40,35,45,5}, B= {1-,30,15} A u B = ? or A u B is the empty set A (upside down u sign) B A (upside down u sign) B is the empty set HELP!!!!!

1. UnkleRhaukus

The union of sets is the set that contains all the elements in the first set and the second set The intersection of sets is the set of elements that appear in both sets for example: if $$X=\{a,b,c\}$$ and $$Y=\{c,d,e\}$$ the ∪nion of $$X$$ and $$Y$$ is $$X\cup Y=\{a,b,c\}\cup\{c,d,e\}=\{a,b,c,d,e\}$$ The i∩tersectio∩ of $$X$$ and $$Y$$ is $$X∩Y=\{a,b,c\}∩\{c,d,e\}={c}$$

2. anonymous

So, do i use your example to solve >< sorry i never learned this

3. UnkleRhaukus

$A= \{40,35,45,5\},\quad B= \{1-,30,15\}$ $A \cup B = ?$

4. UnkleRhaukus

...

5. anonymous

A U B = {40,35,45} U {45,30,15} ?

6. anonymous

EXAMPLE NOT YOUR MATH PROBLEM intersection|dw:1368600603756:dw| WHAT HAPPENS TO INTERSECT C, D, E, F EVERY THING THAT HAPPENS TO INTERSECT IN THE AREA DENOTED BY AREA MARKED ( a) IS THE INTERSECTION OF C, D, E, F UPSIDE DOWN U

7. anonymous

i dont get that

8. anonymous

oh ok...

9. anonymous

So, what I got as an answer is it correct? Do I just plug what is a,b,c, d...etc?

10. anonymous

AUB={1,-30,15,35,45,40,5}

11. anonymous

its 10...

12. anonymous

|dw:1368601433801:dw||dw:1368601675484:dw|

13. anonymous

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14. UnkleRhaukus

$A= \{40,35,45,5\},\quad B= \{1-,30,15\}$ $A \cup B = \{40,35,45,5\}\cup\{1-,30,15\}=$

15. UnkleRhaukus

|dw:1368602785826:dw|

16. anonymous

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17. anonymous

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