यदि \(A_1={x:x\in \mathbb{Z}, x^2=2}\) है, तो \(A_1\) क्या है?
If \(A_1={x:x\in \mathbb{Z}, x^2=2}\), what is \(A_1\)?
Explanation opens after your attempt
A. रिक्त समुच्चयEmpty set
Concept
\(x^2=2\) के हल \(\sqrt{2}\) और \(-\sqrt{2}\) हैं। / The solutions of \(x^2=2\) are \(\sqrt{2}\) and \(-\sqrt{2}\).
Why this answer is correct
ये पूर्णांक नहीं हैं, इसलिए कोई पूर्णांक हल नहीं मिलता। / These are not integers, so there is no integer solution.
Exam Tip
क्षेत्र \(\mathbb{Z}\) हो तो केवल पूर्णांक उत्तर ही मान्य होंगे। / When the domain is \(\mathbb{Z}\), only integer answers are allowed.
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