\(यदि (A={x:x\in\mathbb{N},x\le 9,x\) विषम है\(}) और (B={x:x\in\mathbb{N},x<8,x\) अभाज्य है\(}) हैं, तो (A\cap B) क्या है\)?
\(If (A={x:x\in\mathbb{N},x\le 9,x\) is odd\(}) and (B={x:x\in\mathbb{N},x<8,x\) is prime\(}), what is (A\cap B)\)?
Explanation opens after your attempt
Correct Answer
A. ( {3,5,7} )
Concept
\(A=\{1,3,5,7,9\}\) and \(B=\{2,3,5,7\}\), so the common elements are (3,5,7). Remember that (1) is not prime.
Why this answer is correct
The correct answer is A. ( {3,5,7} ). \(A=\{1,3,5,7,9\}\) and \(B=\{2,3,5,7\}\), so the common elements are (3,5,7). Remember that (1) is not prime.
Exam Tip
\(A=\{1,3,5,7,9\}\) और \(B=\{2,3,5,7\}\), इसलिए समान अवयव (3,5,7) हैं। (1) अभाज्य नहीं है।
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