Set union and intersection

S ? T

1.5

= {x | x?S ? x?T}

S ? T

= {x | x?S ? x?T}

S

T

S

T

S ? T is shaded

S ? T is shaded

Example: Let S={1,2,3,4} and T={2,3,5}. Then

S ? T =

{1,2,3,4,5}

S ? T =

{2,3}

U

U

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