⊂ - X ⋂ Y = X, then X.....Y, ⊃ - X ⋃ Y = Y, Y.... X, ⋃ - {5}.....{x}={5,x}, ⋂ - X......∅ = ∅, ∈ - If a ∈ X ⋂ Y, then a....X and a...Y, ∉ - If X = {1,2}⋂{1,3}, then 3....X ,

Union and Intersection

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?