यदि \(A={x\in\mathbb{Z}: -2\le x<5}\) और \(B={x\in\mathbb{Z}: x^2\le 9}\) हैं, तो (A-B) क्या है?
If \(A={x\in\mathbb{Z}: -2\le x<5}\) and \(B={x\in\mathbb{Z}: x^2\le 9}\), then what is (A-B)?
Explanation opens after your attempt
Correct Answer
A. (A-B={4})
Concept
\(A=\{-2,-1,0,1,2,3,4\}\) and \(B=\{-3,-2,-1,0,1,2,3\}\), so only (4) remains. In exams, list both sets clearly before taking difference.
Why this answer is correct
The correct answer is A. (A-B={4}). \(A=\{-2,-1,0,1,2,3,4\}\) and \(B=\{-3,-2,-1,0,1,2,3\}\), so only (4) remains. In exams, list both sets clearly before taking difference.
Exam Tip
\(A=\{-2,-1,0,1,2,3,4\}\) और \(B=\{-3,-2,-1,0,1,2,3\}\) है, इसलिए केवल (4) बचता है। परीक्षा में अंतर निकालते समय पहले दोनों समुच्चय स्पष्ट लिखें।
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