यदि \(A={x:x\in\mathbb{Z},x^2\le4}\), तो (A) के उचित उपसमुच्चयों की संख्या कितनी है?
If \(A={x:x\in\mathbb{Z},x^2\le4}\), how many proper subsets does (A) have?
Explanation opens after your attempt
Correct Answer
B. (31)
Concept
\(A=\{-2,-1,0,1,2\}\) has (5) elements. Proper subsets are \(2^5-1=31\).
Why this answer is correct
The correct answer is B. (31). \(A=\{-2,-1,0,1,2\}\) has (5) elements. Proper subsets are \(2^5-1=31\).
Exam Tip
\(A=\{-2,-1,0,1,2\}\) में (5) सदस्य हैं। उचित उपसमुच्चय \(2^5-1=31\) होंगे।
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