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anonymous
 4 years ago
De Morgan's Rules
− (A ∪ B) = − A ∪ − B, − (A ∩ B) = − A ∪ − B
Let me demonstrate why I'm confused about the first equality:
U = {1,2,3,4} A = {2} B = {3}
− (A ∪ B) = {1,4}
A = {1,3,4} B = {1,2,4}
− A ∪ − B = {1,2,3,4}
So you can see I don't see how the result is equal sets.
anonymous
 4 years ago
De Morgan's Rules − (A ∪ B) = − A ∪ − B, − (A ∩ B) = − A ∪ − B Let me demonstrate why I'm confused about the first equality: U = {1,2,3,4} A = {2} B = {3} − (A ∪ B) = {1,4} A = {1,3,4} B = {1,2,4} − A ∪ − B = {1,2,3,4} So you can see I don't see how the result is equal sets.

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0that is not what demorgan says

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0That's because you've misstated DeMorgan's rules. The complement of the union is the INTERSECTION of the complements, not the union of the complements.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\lnot (A\cap B)=\lnot A \cup \lnot B\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0and \[\lnot (A\cup B)=\lnot A\cap \lnot B\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0My book is playing tricks with me.... I copy pasted.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0when you remove the parentheses, change intersection to union and union to intersection

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yeah I'm worried though about pursuing the rest o fthe book if they made this mistake.Thanks for the clarification.
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