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yes yes but whats the DIFFERENCE?|dw:1437470805001:dw|
When shown in the venn diagram they are the same?
the symbol U is set union so in that venn diagram for A U B' it means A or NOT B
that upside down U is set intersection... so in that venn diagram for A upside down U B' it means A AND NOT B.
AND is both we have to take A and NOT B into consideration. We can't drop one of them
yes but when drawn are they the same?
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
I think thats wrong
Not B stuff should be shaded outside the circle
Nope this is|dw:1437471596528:dw| is this right?
no... you got the A but look at the middle part It's A AND NOT B B' means NOT B
NOT B so it doesnt get shaded
NOT B the result is SHADED OUTSIDE!
and it intersect with A so inside part
you only have part of it.
B' means B compliment
No it's not the same.. for A U B' A is shaded B' is shaded
A U B' is A or NOT B so the circle A is shaded the outside part of B is shaded
|dw:1437472478843:dw| so my A is shaded
|dw:1437472502792:dw| NOT B IS SHADED
Oh right.Thats what I asked for 20 minutes
venn diagrams are unique... they don't share the same picture.
but esy to understand
|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)
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
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)