determine which of the following shows (a) A ∪ B; and (b) A ∩ B?
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determine which of the following shows (a) A ∪ B; and (b) A ∩ B?
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Answer:
I don't exactly understand the sets you've given me but here's how you do it :
U means union what you do is this :
A = 1 , 2 , 3 , 4
B = 3 , 4 , 5
A U B = 1 , 2 , 3 , 4 , 5
You write everything in both sets and if there's a double you only write it once.
Another one :
∩ means intersection , what you do is this :
A = 1 , 2 , 3 , 4
B = 3 , 4 , 5
A ∩ B = 3 , 4
in intersection , u only write down the similarities in both.