यदि \(\alpha=\sqrt{5}\) और \(\beta=-\sqrt{5}\) हैं, तो \(\alpha+\beta\) और \(\alpha\beta\) का सही युग्म कौन सा है?
If \(\alpha=\sqrt{5}\) and \(\beta=-\sqrt{5}\), which is the correct pair of \(\alpha+\beta\) and \(\alpha\beta\)?
Explanation opens after your attempt
Correct Answer
A. (0,-5)
Concept
(\sqrt{5}+\(-\sqrt{5}\)=0) and (\sqrt{5}\cdot\(-\sqrt{5}\)=-5). Opposite irrationals can have zero sum.
Why this answer is correct
The correct answer is A. (0,-5). (\sqrt{5}+\(-\sqrt{5}\)=0) and (\sqrt{5}\cdot\(-\sqrt{5}\)=-5). Opposite irrationals can have zero sum.
Exam Tip
(\sqrt{5}+\(-\sqrt{5}\)=0) और (\sqrt{5}\cdot\(-\sqrt{5}\)=-5) है। विपरीत अपरिमेयों का योग शून्य हो सकता है।
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