Set notation page 2

 

Page 1 Page 3, summary

 

Here are a couple of tricky ones:

 

 

A

People who like apples

 

This is tricky, but it's not complicated .  The point is that you shade the same places and include the same elements whether you put B in the picture or not, so you don’t need B in either the set notation or the description in words

 

 

same thing in the next one

 

B

People who like bananas.


 

or

People who like neither apples nor bananas

or

People who don’t like apples and don’t like bananas

 

 

The first notation: , where the bar is over the whole thing, says, figure out the union set:

And then take its complement;

The  notation is like an automatic parentheses, so if a long piece has a bar over it, you do that whole thing first, and then take the complement.

 

 

The second notation: says take the complement of each A and B;

 

and then look at where those sets overlap (intersect):

 

 

 

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