यदि \(a=\sqrt{11}+\sqrt{2}\) और \(b=\sqrt{11}-\sqrt{2}\) हैं, तो (ab) और (a+b) का सही युग्म कौन-सा है?
If \(a=\sqrt{11}+\sqrt{2}\) and \(b=\sqrt{11}-\sqrt{2}\), which is the correct pair of (ab) and (a+b)?
Explanation opens after your attempt
Correct Answer
A. (9), \(2\sqrt{11}\)
Concept
(ab=11-2=9) and \(a+b=2\sqrt{11}\). In a conjugate pair check product and sum separately.
Why this answer is correct
The correct answer is A. (9), \(2\sqrt{11}\). (ab=11-2=9) and \(a+b=2\sqrt{11}\). In a conjugate pair check product and sum separately.
Exam Tip
(ab=11-2=9) और \(a+b=2\sqrt{11}\) है। संयुग्मी युग्म में गुणन और योग अलग जाँचें।
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