यदि \(U=\{1,2,3,4,5,6,7,8,9\}\), \(A=\{1,2,3,4\}\) और \(B=\{6,7\}\) है, तो (\(A\cup B\)') क्या है?
If \(U=\{1,2,3,4,5,6,7,8,9\}\), \(A=\{1,2,3,4\}\), and \(B=\{6,7\}\), what is (\(A\cup B\)')?
Explanation opens after your attempt
A. ({5,8,9})
Concept
\(A\cup B={1,2,3,4,6,7}\), so the remaining (5,8,9) in (U) are the complement. Finding the union first is necessary.
Why this answer is correct
The correct answer is A. ({5,8,9}). \(A\cup B={1,2,3,4,6,7}\), so the remaining (5,8,9) in (U) are the complement. Finding the union first is necessary.
Exam Tip
\(A\cup B={1,2,3,4,6,7}\), इसलिए (U) में बचे (5,8,9) पूरक हैं। पहले संघ निकालना जरूरी है।
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