- anonymous

Help!!!
Whats the difference between.....

- chestercat

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- anonymous

|dw:1437470610142:dw|

- kropot72

|dw:1437470686199:dw|

- anonymous

yes yes but whats the DIFFERENCE?|dw:1437470805001:dw|

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## More answers

- anonymous

When shown in the venn diagram they are the same?

- kropot72

|dw:1437470900705:dw|

- UsukiDoll

the symbol U is set union so in that venn diagram for A U B' it means A or NOT B

- UsukiDoll

that upside down U is set intersection... so in that venn diagram for A upside down U B' it means A AND NOT B.

- UsukiDoll

AND is both
we have to take A and NOT B into consideration. We can't drop one of them

- anonymous

yes but when drawn are they the same?

- anonymous

|dw:1437471098586:dw|

- UsukiDoll

hmm I know if I do sets... like numbers
A = 1 2 3
B = 1 2
A U B is 1 2 3 which is all the elements
if A upside down U B then it's what do they have in common and that's just 1 and 2
Oh I see what the problem is ...
isn't that for NOT B or NOT A the outside of the circle gets shaded or something

- anonymous

I think thats wrong

- UsukiDoll

Not B stuff should be shaded outside the circle

- anonymous

Nope this is|dw:1437471596528:dw| is this right?

- UsukiDoll

no... you got the A but look at the middle part
It's A AND NOT B
B' means NOT B

- anonymous

NOT B so it doesnt get shaded

- UsukiDoll

NOT B the result is SHADED OUTSIDE!

- anonymous

and it intersect with A so inside part

- UsukiDoll

you only have part of it.

- anonymous

What?|dw:1437471898711:dw|

- kropot72

|dw:1437471774849:dw|

- zzr0ck3r

B' means B compliment

- anonymous

yeah so|dw:1437472295052:dw|

- UsukiDoll

No it's not the same.. for A U B'
A is shaded
B' is shaded

- UsukiDoll

A U B' is A or NOT B
so the circle A is shaded
the outside part of B is shaded

- UsukiDoll

|dw:1437472448194:dw|

- UsukiDoll

|dw:1437472478843:dw| so my A is shaded

- UsukiDoll

|dw:1437472502792:dw| NOT B IS SHADED

- anonymous

Oh right.Thats what I asked for 20 minutes

- UsukiDoll

venn diagrams are unique... they don't share the same picture.

- anonymous

but esy to understand

- UsukiDoll

|dw:1437472598710:dw| that's the intersection one of A AND NOT B (only something in common is shaded)
|dw:1437472632510:dw| that's the union. A OR NOT B (so shade everything that's being considered. A is shaded and NOT B is shaded)

- UsukiDoll

I guess.. I drew these before and I'm doing them again for the upcoming semester. I was always a huge fan of the U problems... like A U B is A OR B

- anonymous

Alright thanks

- UsukiDoll

so anything to do with NOT is shade outside.
like for the NOT B we don't shade the circle, we shade around the circle (outside - borders)

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