समुच्चय \(A={x\in\mathbb{R}:x^2=2}\) के बारे में सही कथन चुनिए।
Choose the correct statement about \(A={x\in\mathbb{R}:x^2=2}\).
Explanation opens after your attempt
C. \(A={-\sqrt{2},\sqrt{2}}\), परिमित\(A={-\sqrt{2},\sqrt{2}}\), finite
Concept
\(x^2=2\) के वास्तविक हल \(\sqrt{2}\) और \(-\sqrt{2}\) हैं। / The real solutions of \(x^2=2\) are \(\sqrt{2}\) and \(-\sqrt{2}\).
Why this answer is correct
इसलिए समुच्चय में दो अवयव हैं और वह परिमित है। / Thus the set has two elements and is finite.
Exam Tip
वर्ग समीकरण में ऋणात्मक मूल को न छोड़ें। / Do not miss the negative root in a square equation.
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