संख्या रेखा पर ([-3,9]\setminus(2,7]) का सही परिणाम कौन-सा है?
What is the correct result of ([-3,9]\setminus(2,7]) on the number line?
Explanation opens after your attempt
A. ([-3,2]\cup(7,9])
Concept
The removed part does not remove (2), but it removes (7). In exams, pay attention to the endpoints removed in set difference.
Why this answer is correct
The correct answer is A. ([-3,2]\cup(7,9]). The removed part does not remove (2), but it removes (7). In exams, pay attention to the endpoints removed in set difference.
Exam Tip
हटाया गया भाग (2) को नहीं हटाता पर (7) को हटाता है। परीक्षा में set difference में हटने वाले endpoints पर ध्यान दें।
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