\(यदि (U=\mathbb{R}), (A={x:x\le -1\) या \(x>4}), तो (A') क्या है\)?
\(If (U=\mathbb{R}), (A={x:x\le -1\) or \(x>4}), what is (A')\)?
Explanation opens after your attempt
A. \((-1,4])
Concept
To be outside (A), (x>-1) and \(x\le 4\) must hold. Therefore (A'=(-1,4]).
Why this answer is correct
The correct answer is A. \((-1,4]). To be outside (A), (x>-1) and \(x\le 4\) must hold. Therefore (A'=(-1,4]).
Exam Tip
(A) के बाहर रहने के लिए (x>-1) और \(x\le 4\) होना चाहिए। इसलिए (A'=(-1,4]) है।
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