\(यदि (U=\mathbb{R}), (A={x:x\le -1\) 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
Correct Answer

A. \((-1,4])

Step 1

Concept

To be outside (A), (x>-1) and \(x\le 4\) must hold. Therefore (A'=(-1,4]).

Step 2

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]).

Step 3

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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Mathematics Answer, Explanation and Revision Hints

\(यदि (U=\mathbb{R}), (A={x:x\le -1\) या x>4}), तो (A') क्या है? \(/ If (U=\mathbb{R}), (A={x:x\le -1\) or \(x>4}), what is (A')\)?

Correct Answer: A. \((-1,4]). Explanation: (A) के बाहर रहने के लिए (x>-1) और \(x\le 4\) होना चाहिए। इसलिए (A'=(-1,4]) है। / To be outside (A), (x>-1) and \(x\le 4\) must hold. Therefore (A'=(-1,4]).

Which concept should I revise for this Mathematics MCQ?

To be outside (A), (x>-1) and \(x\le 4\) must hold. Therefore (A'=(-1,4]).

What exam hint can help solve this Mathematics question?

(A) के बाहर रहने के लिए (x>-1) और \(x\le 4\) होना चाहिए। इसलिए (A'=(-1,4]) है।