संख्या रेखा पर (\(-\infty,4]\setminus[-2,1\)) को कौन-सा interval दर्शाता है?
Which interval represents (\(-\infty,4]\setminus[-2,1\)) on the number line?
Explanation opens after your attempt
A. (\(-\infty,-2\)\cup[1,4])
Concept
The removed part removes (-2) but does not remove (1). In exams, check the remaining endpoints separately in set difference.
Why this answer is correct
The correct answer is A. (\(-\infty,-2\)\cup[1,4]). The removed part removes (-2) but does not remove (1). In exams, check the remaining endpoints separately in set difference.
Exam Tip
हटाया गया भाग (-2) को हटाता है पर (1) को नहीं हटाता। परीक्षा में set difference में बचने वाले endpoints अलग से जाँचें।
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