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Intersection

prime

union

prime

union

We have:

A= {1,2,3,4,5}

B= {0,6,7,8,9}

C= {2,5,6,7,9}

Π- for example this is the sign of intersection, but it must be the reverse of U.

' - sign of Prime

U- sign of Union.

Ex:

1. AΠC - {2,5}

Solution: A= {1,2,3,4,5}

C= {2,5,6,7,9}

2. AUB= {0,1,2,3,4,5,6,7,8,9}

Solution: you would get all the numbers inside the A and B.

3. C'= {0,1,3,4,5,8}

Solution: to get the Prime of C, get the numbers inside the A and B except the numbers inside the C.