यदि \(U={1,2,\ldots,27}\), \(A={x:x\in U,3\mid x}\), \(B={x:x\in U,9\mid x}\), तो \(A\cap B'\) क्या है?
If \(U={1,2,\ldots,27}\), \(A={x:x\in U,3\mid x}\), and \(B={x:x\in U,9\mid x}\), what is \(A\cap B'\)?
Explanation opens after your attempt
Correct Answer
A. ({3,6,12,15,21,24})
Concept
(A) contains multiples of (3) and (B) contains multiples of (9). Thus \(A\cap B'\) contains multiples of (3) that are not multiples of (9).
Why this answer is correct
The correct answer is A. ({3,6,12,15,21,24}). (A) contains multiples of (3) and (B) contains multiples of (9). Thus \(A\cap B'\) contains multiples of (3) that are not multiples of (9).
Exam Tip
(A) में (3) के गुणज हैं और (B) में (9) के गुणज हैं। इसलिए \(A\cap B'\) में (3) के वे गुणज हैं जो (9) के गुणज नहीं हैं।
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