Curriculum
Course: Mathematics — First Preparatory
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Curriculum

Mathematics — First Preparatory

Unit 1: Numbers

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Unit 2: Algebra

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Unit 3: Statistics

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Unit 4: Geometry

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Text lesson

Sets and Operations on Sets

Mathematics — First Preparatory

Sets and Operations on Sets

Lesson summary

Lesson summary

  • A set is a well-defined collection written between braces { }. The order of its elements does not matter.
  • The symbol ∈ means membership, ⊆ means subset, and the empty set ∅ is a subset of every set.
  • The union ∪ collects all elements, the intersection ∩ takes the common ones, and A − B takes the elements of A only.
  • The complement A′ is what lies in the universal set U but not in A.
  • n(A ∪ B) = n(A) + n(B) − n(A ∩ B).
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