if U is a universal set and it's two subset A and B then prove that (AUB) '=A'nB'
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1
Answer:
\textbf{Concept:}Concept:
x\in\,A\;\implies\;x\notin\,Ax∈A⟹x∈
/
A
x\notin\,A\;\implies\;x\in\,Ax∈
/
A⟹x∈A
\text{To prove: $\bf(A{\cup}B)'=A'{\cap}B'$}To prove: (A∪B)
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=A
′
∩B
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\text{Let\,$x\in(A{\cup}B)'$}Letx∈(A∪B)
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\iff\;x\notin\,A{\cup}B⟺x∈
/
A∪B
\iff\;x\notin\,A\;\&\;x\notin\,B⟺x∈
/
A&x∈
/
B
\iff\;x\in\,A'\;\&\;x\in\,B'⟺x∈A
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&x∈B
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\iff\;x\in\,A'{\cap}B'⟺x∈A
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∩B
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\therefore\boxed{\bf(A{\cup}B)'=A'{\cap}B'}∴
(A∪B)
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=A
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∩B
′
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Step-by-step explanation:
इशू इज यूनिवर्सल सेट एंड इट्स टू सबसेट ए एंड बी डी प्रूफ दैट ए यूनियन बी ए 296
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