संख्या रेखा पर ((-\infty,2]\setminus(-4,0]) को कौन-सा अंतराल दर्शाता है?
Which interval represents ((-\infty,2]\setminus(-4,0]) on the number line?
Explanation opens after your attempt
A. ((-\infty,-4]\cup(0,2])
Concept
The removed part does not remove (-4), but it removes (0). In exams, think carefully about the open and closed endpoints of the removed interval.
Why this answer is correct
The correct answer is A. ((-\infty,-4]\cup(0,2]). The removed part does not remove (-4), but it removes (0). In exams, think carefully about the open and closed endpoints of the removed interval.
Exam Tip
हटाया गया भाग (-4) को नहीं हटाता पर (0) को हटाता है। परीक्षा में हटाए गए interval के खुले और बंद सिरे उलटकर सोचें।
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