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OpenStudy (anonymous):
If A ⊂ B, then???? A ∩ B = B A ∪ B = B A ∩ B = ∅
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OpenStudy (sparrow2):
:D
OpenStudy (sparrow2):
|dw:1453724542246:dw|
OpenStudy (welshfella):
|dw:1453731643506:dw|
OpenStudy (sparrow2):
b
OpenStudy (welshfella):
A is a subset of B
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OpenStudy (anonymous):
so if a is a subset of b then A ∩ B = B
OpenStudy (welshfella):
the sign ∩ means 'intersect' which means the set of elements in BOTH A and B
OpenStudy (welshfella):
that is correct
OpenStudy (welshfella):
|dw:1453731821032:dw|
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