Answer to Question #195944 in Discrete Mathematics for zaynab

Question #195944

Let A, B, and C be sets. Show that (B − A) ∪ (C − A) = (B ∪ C) – A by using Venn diagram?                                                   


1
Expert's answer
2021-05-24T19:09:11-0400

Left Hand Side:

"(B-A)\\cup(C-A)"


"(B-A):"





"(C-A):"




So,

"(B-A)\\cup(C-A)" :






Right Hand Side:

"(B\\cup C)-A"


"(B\\cup C):"




and

"(B\\cup C)-A:"





So, from Venn Diagram, it is clear that

"\\boxed{(B-A)\\cup (C-A)=(B\\cup C)-A}"



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