यदि \(\alpha+\beta=10\) और \(\alpha\beta=21\), तो कौन सा संयुग्मी अपरिमेय युग्म संभव है?
If \(\alpha+\beta=10\) and \(\alpha\beta=21\), which conjugate irrational pair is possible?
Explanation opens after your attempt
B. \(5+\sqrt{5}\) और \(5-\sqrt{5}\)\(5+\sqrt{5}\) and \(5-\sqrt{5}\)
Concept
The pair \(5+\sqrt{5}\) and \(5-\sqrt{5}\) has sum (10) and product (20) so it also fails. The pair (5+2) and (5-2) would be rational so none of the given options fits.
Why this answer is correct
The correct answer is B. \(5+\sqrt{5}\) और \(5-\sqrt{5}\) / \(5+\sqrt{5}\) and \(5-\sqrt{5}\). The pair \(5+\sqrt{5}\) and \(5-\sqrt{5}\) has sum (10) and product (20) so it also fails. The pair (5+2) and (5-2) would be rational so none of the given options fits.
Exam Tip
\(5+\sqrt{5}\) और \(5-\sqrt{5}\) का योग (10) और गुणनफल (25-5=20) है इसलिए यह भी नहीं है। सही युग्म (5+2) और (5-2) परिमेय होगा इसलिए दिए विकल्पों में कोई नहीं।
Login to save your score, XP, coins and progress.