यदि \(U=\mathbb{R}\) और (A=(2,7]), तो (A') क्या होगा?
If \(U=\mathbb{R}\) and (A=(2,7]), what is (A')?
Explanation opens after your attempt
Correct Answer
A. \((-\infty,2]\cup\(7,\infty\))
Concept
(2) was not in the set, so it is included in the complement; (7) was in the set, so it is excluded. Watch open and closed endpoints in intervals.
Why this answer is correct
The correct answer is A. \((-\infty,2]\cup\(7,\infty\)). (2) was not in the set, so it is included in the complement; (7) was in the set, so it is excluded. Watch open and closed endpoints in intervals.
Exam Tip
(2) समुच्चय में नहीं था, इसलिए पूरक में आएगा; (7) समुच्चय में था, इसलिए पूरक में नहीं आएगा। अंतरालों में खुले और बंद सिरों पर ध्यान दें।
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