\(यदि (A={x:x\in \mathbb{N},x\) is a factor of \(18}) और (B={2,3,6,9}) है, तो (A-B) क्या है\)?
\(If (A={x:x\in \mathbb{N},x\) is a factor of \(18}) and (B={2,3,6,9}), what is (A-B)\)?
Explanation opens after your attempt
Correct Answer
A. ( {1,18} )
Concept
\(A=\{1,2,3,6,9,18\}\), and removing (B) leaves ({1,18}). Converting to roster form reduces mistakes.
Why this answer is correct
The correct answer is A. ( {1,18} ). \(A=\{1,2,3,6,9,18\}\), and removing (B) leaves ({1,18}). Converting to roster form reduces mistakes.
Exam Tip
\(A=\{1,2,3,6,9,18\}\) है और (B) हटाने पर ({1,18}) बचता है। सूची रूप में बदलने से गलती कम होती है।
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