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Sets
Junior Cert
Question | Answer |
---|---|
{ } | a collection of elements |
A ∩ B | objects that belong to set A and set B |
A ∪ B | objects that belong to set A or set B |
A ⊂ B | subset has fewer elements than the set |
Ø | Ø = {} empty set |
#A | the number of elements of set A |
a∈A | element of |