Stage 19 · Sets & Intervals — the Language of Functions

19.4.3 Union

19.4 Three Operations on Sets

Point 3 of 5

19.4.3 Union

Core idea

Merge two circles into one pool — in A or in B both count — written A∪B.

Module goal. On "the big canvas of the universal set," learn intersection, union, and complement, and compute them visually with Venn diagrams
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