\(यदि (U={1,2,\ldots,18}), (A={x:x \in U,x\) अभाज्य है}), तो (A') में (3) के गुणजों का समुच्चय कौन सा है?
\(If (U={1,2,\ldots,18}), (A={x:x \in U,x\) is prime}), which set of multiples of (3) lies in (A')?
Explanation opens after your attempt
Correct Answer
A. ({6,9,12,15,18})
Concept
(3) is prime, so it is not in (A'). The remaining multiples (6,9,12,15,18) are in the complement.
Why this answer is correct
The correct answer is A. ({6,9,12,15,18}). (3) is prime, so it is not in (A'). The remaining multiples (6,9,12,15,18) are in the complement.
Exam Tip
(3) अभाज्य है, इसलिए वह (A') में नहीं होगा। बाकी (3) के गुणज (6,9,12,15,18) पूरक में हैं।
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