Let a = {x | X be a positive integer less than 9}, B = {1,2,3}, C = {3.4.5.6.}, find AUB, a ∩ C, a ∩ BUC, Au (B ∩ C) | Math enthusiast | Mathematical art

Let a = {x | X be a positive integer less than 9}, B = {1,2,3}, C = {3.4.5.6.}, find AUB, a ∩ C, a ∩ BUC, Au (B ∩ C)

AUB={1,2,3,4,5,6,7,8},
A∩C={3.4.5.6.}
A∩（BUC）={1,2,3,4,5,6,},
AU（B∩C）={1,2,3,4,5,6,7,8},

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