Two sets are equal if they contain the
same elements. i. e., sets a and b are equal if
∀...
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Mathematics, 06.02.2020 02:42, kishmarlewis
Two sets are equal if they contain the
same elements. i. e., sets a and b are equal if
∀x[x ∈ a ↔ x ∈ b].
notation: a = b.
recall: sets are unordered and we do not distinguish
between repeated elements. so:
{1, 1, 1} = {1}, and {a, b, c} = {b, a, c}.
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Answers: 3
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