संख्या रेखा पर ( \mathbb{R}\setminus(-1,7] ) को किस रूप में दिखाया जाएगा?
How will ( \mathbb{R}\setminus(-1,7] ) be represented on the number line?
Explanation opens after your attempt
Correct Answer
B. ( (-\infty,-1]\cup\(7,\infty\) )
Concept
In the complement, ( -1 ) becomes included and ( 7 ) is excluded. Open and closed endpoints switch when taking complements.
Why this answer is correct
The correct answer is B. ( (-\infty,-1]\cup\(7,\infty\) ). In the complement, ( -1 ) becomes included and ( 7 ) is excluded. Open and closed endpoints switch when taking complements.
Exam Tip
पूरक में ( -1 ) शामिल हो जाता है और ( 7 ) हट जाता है। पूरक लेते समय खुले और बंद सिरे बदल जाते हैं।
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