B u (C n A)
"u" means union
and "n" means intersection
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more ... The set made by combining the elements of two sets. So the union of sets A and B is the set of elements in A, or B, or both. The symbol is a special "U" like this: ∪
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Suppose the universal set is U = all whole numbers from 1 to 9. If A = {1, 2, 4}, then Ac = {3, 5, 6, 7, 8, 9} ...
The cardinal number of a set is the number of elements in the set. ... Note: the set Z = { 0 } is not an empty set. n(Z) = 1, there is one element in the set Z and it is the element 0. Universal Sets: U is the set of all possible elements used in the problem.
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