\(यदि (W={x:x\) एक पूर्णांक है और \(x^2=1}) है, तो (W) क्या है\)?
\(If (W={x:x\) is an integer and \(x^2=1}), what is (W)\)?
Explanation opens after your attempt
A. \(W=\{-1,1\}\)
Concept
The integer solutions of \(x^2=1\) are (-1) and (1).
Why this answer is correct
Both are integers, so both are in the set.
Exam Tip
Under an integer condition, do not forget the negative solution. चरण 1: \(x^2=1\) के पूर्णांक हल (-1) और (1) हैं। चरण 2: दोनों पूर्णांक हैं, इसलिए दोनों समुच्चय में होंगे। चरण 3: पूर्णांक शर्त में ऋणात्मक हल को न भूलें।
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