यदि \(U=\{1,2,3,4,5,6\}\), \(A=\{1,2,3\}\) और \(B=\{3,4\}\) हों, तो \((A\cup B)^c\) क्या होगा?
If \(U=\{1,2,3,4,5,6\}\), \(A=\{1,2,3\}\), and \(B=\{3,4\}\), what is \((A\cup B)^c\)?
Explanation opens after your attempt
A. \(\{5,6\}\
Concept
\(A\cup B=\{1,2,3,4\}\) — the union contains all elements from both sets. The complement means the elements of the universal set \(U\) that are not in this union. Removing \(\{1,2,3,4\}\) from \(U\) leaves \(\{5,6\}\). So the correct answer is \(\{5,6\}\). The closest distractor \(\{1,2,5,6\}\) is wrong because it incorrectly includes \(1\) and \(2\), which belong to \(A\cup B\) and cannot be in the complement. Exam tip: compute the union/intersection first, then get the complement by subtracting from the universal set.
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