\(यदि सार्वत्रिक समुच्चय (U={1,2,3,\ldots,20}) और (A={x:x \in U\) तथा x अभाज्य है}) है, तो (A') क्या होगा?
\(If the universal set is (U={1,2,3,\ldots,20}) and (A={x:x \in U\) and x is prime}), then what is (A')?
Explanation opens after your attempt
A. (A'={1,4,6,8,9,10,12,14,15,16,18,20})
Simple Explanation
(A') में (U) के वे सदस्य आते हैं जो (A) में नहीं हैं। परीक्षा में (1) को अभाज्य न मानें। / (A') contains the elements of (U) that are not in (A). In exams remember that (1) is not prime.
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