anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
that is not what demorgan says
anonymous
  • anonymous
That'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
  • anonymous
\[\lnot (A\cap B)=\lnot A \cup \lnot B\]

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anonymous
  • anonymous
and \[\lnot (A\cup B)=\lnot A\cap \lnot B\]
anonymous
  • anonymous
My book is playing tricks with me.... I copy pasted.
anonymous
  • anonymous
when you remove the parentheses, change intersection to union and union to intersection
anonymous
  • anonymous
Yeah I'm worried though about pursuing the rest o fthe book if they made this mistake.Thanks for the clarification.

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